) You are an engineer on a remote farm that utilizes solar systems for all their power needs. There is a lot of discussion over the last few days of the impact of harmonics on power quality and a possible reason for your recent power supplies burning. Your farm manager is requesting: (a) advise on getting a pure sine wave from inverters. (b) With the aid of a circuit, input and output waveforms, explain the operation of a seven (7) level multi-level single phase inverter