5. Suppose you were to perform a curve t to some data set using the linear model f(a:) = Asin(:s) + Bcos(a:) to the three points (7r; 1), (arr/2; 2), (31r/2; 3). (a) (10 pts) Set up the overdetermined linear system for the least squares problem. (1)) (10 pts) Set up the corresponding normal equations and use them to find the parameters A and B