Please help with this Linear Algebra problem.....

1. Matrix-matrix products:
Consider two vectors
[b]x=[1 2 3][/b]
[b]y=[4 5 6][/b]
and two matrices [b]A=[7 8 9; 10 11 12; 13 14 15][/b]
[b]B=[12 3 ; 5 6 7; 8 9 10][/b]

a. Find all legal MATLAB products (using * operator) between two vectors x and y that produce meaningful results. Show the results also. Exclude the array operator .*.

b. Similarly, find all products between matrices A and B (and their transposes) and show the results.

c. Find all legal products between vector x and matrix A.

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