An athlete with a piece of ticker tape attached to herself with the tape timer running, and produces the tape shown below. According to the tape, she was traveling (THE PICTURE HAS THE TAPE AND THE MULTIPLE CHOICE ANSWERS PLEASE HELP WILL GIVE BRAINLIST)

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s