Sine and cosine graph modeling: Word problems

An object moves in simple harmonic motion with period 8 seconds and amplitude 2 in. At time t = 0 seconds, its displacement d from rest is 2 in, and initially it moves in a negative direction. Give the equation modeling the displacement d as a function of time t.

A weight on the end of a coiled spring is pushed 11 cm above its resting position. The weight is released and moves downward, passing its resting position at t = 0 seconds and then oscillating in simple harmonic motion. It completes one cycle in 0.1 seconds. Give the equation modeling the displacement d as a function of time t.