66111 for t > O s. (7t+4)s 01. A 135 9 ball moves horizontally with velocity vx = a) What is the velocity of the ball at t = 1 3? (Draw a sketch representing the problem on a coordinate system, answer in decimal form with the units). b) What is the acceleration of the ball at t = 1 3. (show all the steps clearly when taking the derivative, answer to three significant figures with the units). c) What is the net force on the ball at t = 1 5. (equation being used and its name, and kanswer to two significant gures with the units)