A 10-F capacitor is charged to 2 V. A path is established between its terminals which draws

A 10-μF capacitor is charged to 2 V. A path is established between its terminals which draws a constant current of I0. 

(a) For I₀ = 1 mA, how long does it take to reduce the capacitor voltage to 5 percent of its initial value?

(b) For what value of I₀ does the capacitor voltage remain above 90 percent of its initial value after passage of 24 hours?