3. The function f (at, y) = $2 icy + y2 61: is to be minimized, with initial estimate 2:0 : (3, 0). (a) Use an exact line search and the method of steepest descent to determine the next point 3:1. Show that :01 = (2,1) . [Hintz Minimise g(t) = f ($0 + tdo) for t > 0 by solving 9' (t) = 0 for the smallest value of t ]