Apulsar is a rapidly rotating neutron star that emits a radio beam the way a lighthouse emits a light beam. we receive a radio pulse for each rotation of the star. the period t of rotation is found by measuring the time between pulses. suppose a pulsar has a period of rotation of t = 0.0452 s that is increasing at the rate of 4.69 x 10-8 s/y. (a) what is the pulsar's angular acceleration alpha? (b) if alpha is constant, how many years from now will the pulsar stop rotating? (c) suppose the pulsar originated in a supernova explosion seen 714 years ago. assuming constant alpha, find the initial t.