4. Two capacitors 3.0 pF and 6.0 pF are connected in series. If the capacitors are connected to a potential difference of 1000 V, calculate :- {a} The equivalent capacitance C .q of the combination. {h} The magnitudes of the charge on each capacitor. {:1 The potentlal dlfferenoe across each capacitor. {d} The energy,' stored in each capacitor