A keyboarder's speed over a 5-min interval is given by the following function, where W(1) is the speed, in words per minute, at time t. 100 My W(1) = - 612 + 121+90 a) Find the speed at the beginning of the interval b) Find the maximum speed and when it occurs c) Find the average speed over the 5-min interval 1 of 3 of Do omplet 4 0 of 2 a) The speed at the beginning of the interval is words per minute ) of co (Simplify your answer ) b) The maximum speed is words per minute and it occurs at t = min (Simplify your answers. Type integers or decimals.) c) The average speed over the 5-min interval is words per minute (Simplify your answer.) Time Remaining: 01:47:00