please provide the solution

question 3 student shows you the following calculations: Let a = b X=1 aa= al X x X = X :. 2 2 -x = 0 ( a H ) (0 - 17 ) = 6 ( a-b) X ( 2 - 1 ) = D. at b = 6 X = I - 1 2 b =6 X =0 1 = 0 2 = 1 What is wrong with these calculations and how would you explain the fallacies? (Explain mathematical reasons in detail) (7 marks) Question 4 Another student in your math specialist class comes up with: -1 = -1 -1/1 = -1/1 -1/1 = 1/-1 -1/1 = V1/ - 1 i/1 = 1/i i = 1/i i2 = 1 -1 = 1