I got this question wrong on my quiz and tried doing it over, but keep getting similar answers. please help

3.Consider the circuit to the right composed of an uncharged capacitor, a resistor and a battery. The battery voltage is 50 V, the resistance is 500 k$2, and the capacitance is 10 uF. 10 UF a. If we initially have the switch connected to point A, what total charge will be accumulated when it is fully charged? 2500 b. We now move the switch to position B. How long will it take for the charge to decrease to 37% of it's initial value? 2500 = $ 10 500 - 10