(1 point) A child wanders slowly down a circular staircase from the top of a tower. With x, y, z in feet and the origin at the base of the tower, her position + minutes from the start is given by (a) How tall is the tower? height= ft (b) When does the child reach the bottom? time = minutes (c) What is her speed at time t? speed = ft/min (d) What is her acceleration at time t? acceleration = ft/min2 Note: You can earn partial credit on this problem. x = 25 cost, y = 25 sint, z= 70 - 5t.