A buoy oscillates in simple harmonic motion Y=A cos cot as waves move past it. The buoy moves a total of 3.5 feet (vertically) from its low point to its high point. It returns to its high point every 10 seconds.

a) Write an equation describing the motion of the buoy if it is at its high point att= 0.

b) Determine the velocity of the buoy as a function oft.

c) Determine the times when the velocity of the buoy is greatest. What is the velocity at these times?