1. a. Amplitude a = 6

b. Initial velocity = − 9 cm/s

c. Initial position x = 3√3 cm

d. Frequency T = 3/ 2π per second

e. Time t = π / 9 seconds

2. a. x = 4 cos (πt / 10)

b. vMAX= 2π/5 m/s

c. t = 10/3 seconds

Speed v = 1.09 m/s

Acceleration = -0.197 m/s2

3. a. a = 18

b. α = -0.685

c. Max speed = 6 m/s