diff --git a/2_Image_Filtering.ipynb b/2_Image_Filtering.ipynb
index 29e7721..eed35de 100644
--- a/2_Image_Filtering.ipynb
+++ b/2_Image_Filtering.ipynb
@@ -945,7 +945,7 @@
    "source": [
     "### Exercise 3: Find other image filtering algorithms\n",
     "\n",
-    "The classes in ITK are organized into **Modules**, and collections of Modules are organized into **Groups**. Examine the [Image Smoothing](https://itk.org/Insight/Doxygen/html/group__ITKSmoothing.html) Module and the [Filtering](https://itk.org/Insight/Doxygen/html/group__Group-Filtering.html) Group. Can any other smoothing or denoising classes be found? "
+    "The classes in ITK are organized into **Modules**, and collections of Modules are organized into **Groups**. Examine the [Image Smoothing](https://itk.org/Doxygen/html/group__ITKSmoothing.html) Module and the [Filtering](https://itk.org/Doxygen/html/group__Group-Filtering.html) Group. Can any other smoothing or denoising classes be found? "
    ]
   },
   {
diff --git a/5_Registration.ipynb b/5_Registration.ipynb
index cab3503..4d66280 100644
--- a/5_Registration.ipynb
+++ b/5_Registration.ipynb
@@ -367,7 +367,7 @@
     "\n",
     "resampler.Update()\n",
     "\n",
-    "plt.imshow(itk.array_view_from_image(movingImage))"
+    "plt.imshow(itk.array_view_from_image(resampler.GetOutput()))"
    ]
   },
   {
@@ -444,7 +444,7 @@
    "source": [
     "## Exercise 3: Image similarity matching metrics\n",
     "\n",
-    "Examine the available [registration framework image similarity matching metrics](https://itk.org/Doxygen/html/classitk_1_1ImageToImageMetricv4.html).\n",
+    "Examine the available [registration framework image similarity matching metrics](https://itk.org/Doxygen/html/group__RegistrationMetrics.html).\n",
     "\n",
     "- Can an alternative metric be used in the registration pipeline above?\n",
     "- Which metrics should be used for multi-modality registration?"
diff --git a/solutions/4_ITK_and_NumPy_answers_Exercise1.py b/solutions/4_ITK_and_NumPy_answers_Exercise1.py
index 1463f30..aad3f30 100644
--- a/solutions/4_ITK_and_NumPy_answers_Exercise1.py
+++ b/solutions/4_ITK_and_NumPy_answers_Exercise1.py
@@ -6,6 +6,13 @@
 im=itk.imread('data/CBCT-TextureInput.png', itk.F)
 sobel=itk.sobel_edge_detection_image_filter(im)
 arr = itk.array_from_image(sobel)
+
+plt.subplot(1, 2, 1)
+plt.gray()
+plt.imshow(itk.array_view_from_image(im))
+plt.axis('off')
+
+plt.subplot(1, 2, 2)
 plt.gray()
 plt.imshow(arr)
 plt.axis('off')