(Answered): Given an automatic street light control circuit usingtransistors, a relay and an LDR shown in Figure ...

Given an automatic street light control circuit usingtransistors, a relay and an LDR shown in Figure 2:

1. Explain why the components are used in the circuit;
2. Explain the modes of operation of BJT working for thecircuit;
3. Concisely explain the operation of the circuit.
4. Design an automatic street light control circuit using op-amp,relay and LDR