An op$-$amp with an open loop output of $1\mathrm{.}5$ Volt has a differential input of $1$ micro volt. What will be the open loop gain? Explain your answer with a circuit schematic and calculations.$(2.$b$)$ If the above op$-$amp witnesses a differential voltage with inverting terminal potential more than non$-$inverting input by $1\mathrm{.}5$ mV and power$-$supply terminals are at $24$ Volt and $0$ volts, what will be the value of the output voltage? Explain your answer with a calculation.If now the negative voltage of the op$-$amp is changed to $-24$ Volt what will be the output voltage?Explain your answer with necessary circuit schematics and calculations.