Need code in MATLAB asap please, will give like.

3. Consider the following matrices: A=31212221122,B=233578531062,C=287 (a) Verify that A is an orthogonal matrix, i.e., AA=AA=I. (8 pts) (b) Solve the linear equations, By=C, to find y. ( 8pts) (c) Write a for loop to calculate matrix product, AC. Directly using matrix operation as " AC " will not get the credit for this question. Hint: Use nested for loops. (14 pts) (d) Calculate (AC)B with matrix operation. The result will be a 4-element vector. (5 pts)