In the circuit belоw, аll the cаpаcitоrs have a value оf 470 uF. Initially, both switches are open. Switch 1 is closed for 940 ms and then reopened. Then, switch 2 is closed. Find a) the total energy stored in the circuit after switch 1 is reopened b) the instantaneous power emitted by R7 exactly 470 ms after switch 2 is closed.