Please help

The figure below shows a simplified model of a cardiac defibrillator, a device used to resuscitate patients in ventricular fibrillation. R C Z + Rforso E When the switch S is toggled to the left, the capacitor C charges through the resistor R. When the switch is toggled to the right, the capacitor discharges current through the patient's torso, modeled as the resistor R., allowing the heart's normal rhythm to be reestablished. HINT (a) If the capacitor is initially uncharged with C = 7.50 uF and & = 1240 V, find the value of R (in ohms) required to charge the capacitor to a voltage of 755 V in 1.20 s. 170.44 x n (b) If the capacitor is then discharged across the patient's torso with R = 1260 0, calculate the voltage (in V) across the capacitor after 6.50 ms. 754.45 X V