The given two-parameter family is a solution of the indicated differential equation on the interval (−[infinity], [infinity]). determine whether a member of the family can be found that satisfies the boundary conditions. (if yes, enter the solution. if an answer does not exist, enter dne.) y = c1ex cos x + c2ex sin x; y '' − 2y ' + 2y = 0

(a) y(0)=1, y'(pi)=0
(b) y(0)=1, y(pi)=-1
(c) y(0)=1, y(pi/2)=1
(d) y(0)=0, y(pi)=0