A spherical raindrop 1.7 mm in diameter falls through a vertical distance of 4150 m. Take the cross-sectional area of a raindrop =πr^{2}, drag coefficient =0.45, density of water to be 1000 kg/m^{3}, and density of air to be 1.2 kg/m^{3}.

(a) Calculate the speed a spherical raindrop would achieve falling from 4150 m in the absence of air drag.

(b) What would its speed be at the end of 4150 m when there is air drag?