g Design a simple op-amp oscillator-based function generator. Your generator must produce three different waveforms: Sinusoidal, square, and triangular waves. You may use switches to select the waveform sent to the output. The oscillator frequency should be 500 Hz, and produce a peak voltage of no less than 0.5 V. You may use batteries, or our DC power supplies to power your function generator. Standard devices may be obtained from the EE shop; if you need other devices you will have to purchase them.