A particle oscillates in simple harmonic motion with a period of 2.04 ? s and an amplitude of 3.94? cm. At t=0,it is at z=?2.0 cm and it is moving toward z = 0. We wish to write the position of the particle as a function of time in the following form, z(t) = c1 cos(c2t + c3). (a) What is c1 (cm)? (b) What is c2 (rad/s)? (c) What is c3 (rad)? (Give the answer in the range ?? to ?.)