HELP ME PLEASE One group of students made a local watershed model. The watershed model was most likely used by the students to

demonstrate surface water collection at different locations
forecast floods and droughts at the location
investigate the amount of rain water used at the location
forecast the amount of precipitation falling at the location

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