1) Find the matrix product, if possible, please.

[ 6 0 -4 ] [1]

[ 1 2 5 ] [2]

[ 10 -1 3] [3]

2) Decide whether the given matrices are inverse of each other. ( Check to see if their product is the identity matrix 1:

[ 1 0 0 ] [1 0 0]

[ -1 -2 3 ] and [ 0 0 1]

[ 0 1 0] [1/3 1/3 2/3]

Thank you!