plz see the attachment

Remaining Time: 278:42:09 The rate of acceleration due to gravity on Mars is approximately 3.8 m/s2. Air resistance is negligible. You stand at the top of a cliff and drop a wrench. Using "up" as the positive direction, and with t = 0 corresponding to when you dropped the wrench, answer the following questions, paying attention to signs. (a) What is the velocity function of the wrench as it falls? U(t) mis (b) What is the displacement function of the wrench, if your altitude when you stand at the top of the cliff is measured as 1,600 m by a GPS? s (t) = m (altitude) (c) If the wrench hits the ground at the bottom of the cliff with a speed pill lim's. what is the height of the cliff (that is, the difference in altitude between the top of the cliff and the ground)? h =