(1) Compute the coefficient matrix XT X for the normal equations, and save its value as normal_coef1. Recall, the transpose of a NumPy array A can be obtained by np. transpose(A), while the matrix produce of two (appropriately- sized) NumPy arrays A and B is obtained by np. matmul(A, B) or [email protected] (2) Compute the right-hand side XT Y of the normal equations, and save its value as normal_vect1.