Can someone please explain it to me ASAP??!!! Separable Differential Equations

When an obiect is in free fall. the velocity of the object satises the differential equation m - v'(t) = mg + f(v) where f is a function that models the resistance. Assume the resistance is given by f(v) = - Rv, where R > 0 is a drag coefcient. Complete parts (a) through (d) below. d. Glaph the solution found in part (c) with 9 =9.8 rn I 52. m = 0.8, and R = 0.2. and verify that the terminal velocity agrees with me value found in part (b). Choose the outset graph below. The terminal velocity according to the formula in part (b) e E] nus. . . (Shortly-yew answer.) , - '_ A