$6.$ The following operational amplifier RC oscillator generates square waveform whosevalues change between $+$Vce and $-$Vcc$.$ Consider Ro $=$ Rp $=$ R $=10$ Kg in this circuit.$($a$)$ Describe the operation of the circuit. First assume Vour is at $+$Vcc$.$ Explain how the switching to $-$Vce takes place at the output. Draw the waveform for Vourt$).$ VREF$)$ and VsiG$(1).($b$)$ Calculate the value of the capacitor, C$,$ if the period of oscillation is $2$ us$.$ That means that Vourt$)$ is at $+$Vcc for a period of $1$ us and at $-$ Vce for a period of $1$ us$.$