(a) Using Eq. (26.17) for the current in a discharging capacitor, derive an expression f...

(a) Using Eq. (26.17) for the current in a discharging capacitor, derive an expression for the instantaneous power dissipated in the resistor. (b) Integrate the expression for P to find the total energy dissipated in the resistor, and show that this is equal to the total energy initially stored in the capacitor.