Discharging a capacitor and dissipated energy

A $470\mu \mathrm{F}$ capacitor, charged to a voltage of $20\mathrm{V}$, discharges through a $1.0\mathrm{k\Omega }$ resistor. Compute the initial current, the voltage across the capacitor after $1.0\mathrm{s}$ and the total energy dissipated in the resistor.