The total mark is 31+52=83. The marks breakdown is as follows:

PS#10
9 Q1
13 Q2
9 Q3
Total: 31

PS#11
12 Q1(a)
10 Q2(b)
6 Q4(a)
10 Q6
4 Q8
10 Q9
Total: 52

31+52 is 83


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Except for the last question, it was pretty straightforward, and
generally well done. Even the proof in PS11 #6 was done well.

A bit of carelessness with some occasionally forgetting the (-1)^i+j
term in calculating the cofactor.

Most did not attempt the last question or got stuck after 'base case'.
The few that completed it mostly did it fine.
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overall the assignments were well done.. students need to be more
cautious when calculating determinants for 3x3 matrix and should work on
the inductive proofs.
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PS #10
Questions 1 and 2 were done well.
Question 3 was done well a few different ways as not everyone
automatically thought of the inductive solution.

PS #11
Question 1a was done well.
Question 2b - some students may want to practice their complex number
multiplication.
Questions 4, 6, and 8 were done well in general.
Question 9 was done very well by those who attempted it.  Don't forget the
base case of r = 1.

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Students in general had more trouble with this assignment.  The
questions with the most trouble were:

PS#10, 3
PS#11, 9

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-Forgetting to include the negative one factor when calculating
cofactors
was a common mistake.
-Students rarely used induction for PS10, Question 3; they simply
factored
alpha out of each of the n rows of alphaA.
-An interesting alternate solution for PS 11, Question 6(b) was to add
row
3 to row 2 to get a row of 9's.

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