Part A What is the average force exerted on him by the ground during the jump? Express your answer with the appropriate units: HA O ? Value Units Submit Request Answer Part B What is his maximum speed? Express your answer with the appropriate units.A 61-kg acrobat must jump high and land on his brother's shoulders. To accomplish this, he leaps from a crouched position to a height where his conter of mass is 1.20 m above the ground. His center of mass is 400 mm above the ground in the crouch and 900 mm above the ground when his foot leave the ground