For questions 13, either show that the indenite integral diverges or evaluate it if it converges: (1) 5 f 3 dz: 0 (I: _ 2 Q1) (a) For what values of k; does the function y = cos kt satisfy the differential equation 43;\" = 25y? (b) For those values of k) verify that every member of the family of functions y=Asinkt+Beoskt is also a solution