adapted to instructions

exercises/solutions/3_files_and_commands/image_reconstruct.json

 {
-  "name": "Image montage",
+  "name": "Image reconstruction",
   "fws": [
     {
       "fw_id": 0,

exercises/solutions/3_files_and_commands/image_reconstruct.yaml

@@ -82,4 +82,4 @@ links:
   '4': [5]
   '5': []
 metadata: {}
-name: Image montage
+name: Image reconstruction

exercises/solutions/4_wflow_append/image_swirl_montaged.json

 {
   "name": "Swirl an image in different angles",
   "fws": [
+    {
+      "fw_id": -6,
+      "name": "Pass filename",
+      "spec": {
+        "_tasks": [
+          {
+            "_fw_name": "PythonFunctionTask",
+            "function": "auxiliary.print_func",
+            "inputs": ["montaged image"],
+            "outputs": ["montaged image"]
+          }
+        ]
+      }
+    },
     {
       "fw_id": -1,
       "name": "Swirl 90",
@@ -147,10 +161,7 @@
             "command_spec": {
                 "command": ["convert", "-delay", "10", "-loop", "0"],
                 "original image": {
-                    "source": {
-                        "type": "path",
-                        "value": "/tmp/capitalA.png"
-                    }
+                    "source": "montaged image"
                 },
                 "swirl 360": {
                     "source": "swirl 360"
@@ -176,6 +187,13 @@
       }
     }
   ],
-  "links": {"-1": [-5], "-2": [-5], "-3": [-5], "-4": [-5], "-5": []},
+  "links": {
+    "-1": [-5],
+    "-2": [-5],
+    "-3": [-5],
+    "-4": [-5],
+    "-5": [],
+    "-6": [-1, -2, -3, -4, -5]
+  },
   "metadata": {}
 }

exercises/solutions/4_wflow_append/image_swirl_montaged.yaml

+fws:
+- fw_id: -6
+  name: Pass filename
+  spec:
+    _tasks:
+    - _fw_name: PythonFunctionTask
+      function: auxiliary.print_func
+      inputs: [montaged image]
+      outputs: [montaged image]
+- fw_id: -1
+  name: Swirl 90
+  spec:
+    _tasks:
+    - _fw_name: CommandLineTask
+      command_spec:
+        command: [convert, -swirl]
+        original image: {source: montaged image}
+        swirl 90:
+          target: {type: path, value: /tmp}
+        swirl angle:
+          source: {type: data, value: '90'}
+      inputs: [swirl angle, original image]
+      outputs: [swirl 90]
+- fw_id: -2
+  name: Swirl 180
+  spec:
+    _tasks:
+    - _fw_name: CommandLineTask
+      command_spec:
+        command: [convert, -swirl]
+        original image: {source: montaged image}
+        swirl 180:
+          target: {type: path, value: /tmp}
+        swirl angle:
+          source: {type: data, value: '180'}
+      inputs: [swirl angle, original image]
+      outputs: [swirl 180]
+- fw_id: -3
+  name: Swirl 270
+  spec:
+    _tasks:
+    - _fw_name: CommandLineTask
+      command_spec:
+        command: [convert, -swirl]
+        original image: {source: montaged image}
+        swirl 270:
+          target: {type: path, value: /tmp}
+        swirl angle:
+          source: {type: data, value: '270'}
+      inputs: [swirl angle, original image]
+      outputs: [swirl 270]
+- fw_id: -4
+  name: Swirl 360
+  spec:
+    _tasks:
+    - _fw_name: CommandLineTask
+      command_spec:
+        command: [convert, -swirl]
+        original image: {source: montaged image}
+        swirl 360:
+          target: {type: path, value: /tmp}
+        swirl angle:
+          source: {type: data, value: '360'}
+      inputs: [swirl angle, original image]
+      outputs: [swirl 360]
+- fw_id: -5
+  name: Make an animation from a list of images
+  spec:
+    _tasks:
+    - _fw_name: CommandLineTask
+      command_spec:
+        animation:
+          target: {type: path, value: /tmp/capitalA-swirled-animated.gif}
+        command: [convert, -delay, '10', -loop, '0']
+        original image: {source: montaged image}
+        swirl 180: {source: swirl 180}
+        swirl 270: {source: swirl 270}
+        swirl 360: {source: swirl 360}
+        swirl 90: {source: swirl 90}
+      inputs: [original image, swirl 90, swirl 180, swirl 270, swirl 360, swirl 270,
+        swirl 180, swirl 90, original image]
+      outputs: [animation]
+links:
+  '-1': [-5]
+  '-2': [-5]
+  '-3': [-5]
+  '-4': [-5]
+  '-5': []
+  '-6': [-1, -2, -3, -4, -5]
+metadata: {}
+name: Swirl an image in different angles