Which computer based optimization technique would you recommend for each of the following objective functions? Please justify your answer briefly in each case. b Fletcher and Powell's helical valley: f(x) = 100 ((x_3 - 10 theta (x_1, x_2))^2 + (Squareroot x^2_1 + x^2_2 - 1)^2) + x^2_3: where 2 pi theta (x_1, x_2) = {arctan x_2/x_1 if x_1 > 0 pi + arctan x_2/x_1 if x_1