The velocity v of a falling parachutist is given by v = gm/c (1-e^{-(c/m)t}) where g = 9.8m/s^2. For a parachutist with a drag coefficient c = 15kg/s, compute the mass m so that the velocity is v = 35m/s at t=9s. Us the bisection method & the false-position method to determine m to a level of epsilon_s = 0.1%.