If a rock is thrown upward on the planet Mars with a velocity of 20 1113's, its height after t. seconds is giyen by the equation his) 2 20$ 1.86%. a] Find the 1yelocity ofthe rock after one second. b) Find the yelocity of the rock when t = o. c) When will the rock hit the surface of the planet? Round your answer to 3 decimal places. d) What will the 1yelocity ofthe rock be when it hits the surface of the planet? Ftound your answer to 3 decimal places