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A) Find the inverse of the following square matrix. I 5 0 I I 0 10...

A) Find the inverse of the following square matrix.

I 5 0 I

I 0 10 I

(b) Find the inverse of the following square matrix.

I 4 9 I

I 2 5 I

c) Find the determinant of the following square matrix.

I 5 0 0 I

I 0 10 0 I

I 0 0 4 I

(d) Is the square matrix in (c) invertible? Why or why not?

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