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+========
+ Script
+========
+
+Welcome. 
+
+This spoken tutorial is a self-assessment tutorial and you will be
+able to assess yourself on the concepts learnt in the Module on Arrays
+and Matrices. 
+
+
+As with all other assessments we will first start with a few short
+questions that will not take you more that 15 to 20 seconds to
+answer. Then we shall move on to a bigger problem, that you are
+expected to solve in less than 10 mins. 
+
+
+  * Given a list of marks::
+   
+      marks = [10, 20, 30, 50, 55, 75, 83]
+
+    How will you convert it to an array?
+
+  * What is the shape of the following array?::
+
+      x = array([[1,2,3,4],
+                 [3,4,2,5]])
+
+  * What is the resulting array::
+
+      a = array([[1, 2],
+                 [3, 4]])
+      
+      a[1,0] = 0
+ 
+  * What is the resulting array?::
+
+      x = array(([1,2,3,4],
+                 [2,3,4,5]))
+
+      x[-2][-3] = 4
+
+
+  * How do we change the array ``x = array([[1,2,3,4]])`` to
+    ``array([[1,2,0,4]])``?
+
+  * How do we get the slice::
+
+      array([[2,3],
+             [4,2]])
+
+    out of the array::
+
+      x = array([[1,2,3,4],
+                 [3,4,2,5]])
+
+
+  * What is the output of x[::3,::3], when x is::
+
+      x = array([[9,18,27],
+                 [30,60,90],
+                 [14,7,1]])
+
+  * How do you get the transpose of this array?::
+
+      a = array([[1, 2],
+                 [3, 4]])
+
+  * What is the output of the following?::
+
+      a = array([[1, 2],
+                 [3, 4]])
+
+      b = array([[1, 1],
+                 [2, 2]])
+
+      a*b
+
+
+{{{ show slides with solutions to these problems }}}
+
+Now, let us move on to a larger problem. From the image
+`tagore-einstein.png``
+
+  + extract the face of Einstein alone.
+  + extract the face of Tagore alone.
+  + get a smaller copy of the image, that is a fourth it's size. 
+