A keyboarder's speed over a 6-min interval is given by the following function, where W(t) is the speed, in words per minute, at time Ay t. 40- W(t) = - 31 + 12t + 36 ts a) Find the speed at the beginning of the interval. 20- b) Find the maximum speed and when it occurs. c) Find the average speed over the 6-min interval. SS . .... a) The speed at the beginning of the interval is words per minute. brar (Simplify your answer.) ions 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 6-min interval is words per minute. (Simplify your answer.) Enter your answer in each of the answer boxes. Re