Arectified triangular wave form is defined by the periodic function f(t) f(t + t) where a rectified triangular for 0 < t < fortt. 10 f(t) t - m a. find the fouricr scrics cxpansion of f(t) b. if f(t) represents the driving force on a lightly damped spring system, write down (without solving from first principles): (1.) the complementary solution, and (2,) the particular solution for the mass's position.