At a cheerleading contest, Heather is launched up into the air from rest by her three friends. Each of her friends exerts an average force of 352 N on her (i.e., the total force of the three is 1056.0 N) over a distance of 65cm. Heather's mass is 45 kg. (Use g = 9.8 m/s) (a) Draw a free-body diagram of Heather. What is the average net force exerted on Heather while her friends launch her up (i.e. from all sources, not just her friends)? Express your answer in N. (b) What speed does Heather reach just as her friends let go of her? Express your answer in m/s. (c) What is the additional height that Heather travels in mid-air after her friends let go of her? Express your answer in meters.