Question: Please solve 3 and 4 3. Let A be a nonsingnlar 2 x 2 matrix. in] Find P, the projection matrix onto C(A). (I1) Find

Please solve 3 and 4

3. Let A be a nonsingnlar 2 x 2 matrix. in] Find P, the projection matrix onto C(A). (I1) Find C(21) and comment on the result. of part (a). 4. (:1) Given the points (1,2), (2, U). and (4. 1). Find the equation of the straight line that best tu these points. 1 1 (h) Find P, the projection matrix on C(A). where A = 1 2 1 4 [e] Verify that P2 = P

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