A 763 Ω resistor, an uncharged 172 μF capacitor, and a 6.01 V EMF are connected in series. The capacitor is initially uncharged.

a) Calculate the time constant of the circuit.
b) Determine the current in the circuit at t = 0.01 s.
c) Calculate the voltage across the capacitor at t = 0.02 s.
d) All of the above.