The drive propeller of a ship starts from rest and accelerates at 3.50X 10^-3 rad/s^2 for 1.80 X 10^3 seconds. For the next 3.60 X 10^3 seconds, the propeller rotates at a constant angular speed. Then it decelerates at 2.00 X 10^-3 rad/s^2, until it slows (without reversing direction) to an angular speed of 5.00 rad/s. Find the total angular displacement of the propeller.