Question: Please solve these two question, thank you so much ! Consider the matrix A = X(X X)-1XT. 6. X has 5 rows and 3 columns.

Please solve these two question, thank you so much !

Consider the matrix A = X(X X)-1XT. 6. X has 5 rows and 3 columns. What are the dimensions of A? 7. Pick any 5x3 matrix for X (at least 9 of elements of X have to be different from 0 or 1). Your choice! Calculate A ( A - I ). (Hint the answer to this question is possibly much shorter than what you would expect!)

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