Op-amps can be used with nonlinear circuit elements such as diodes to obtain circuit functions that cannot be realized using simply resistors and current and/or voltage sources. (a)consider the op-amp circuit at right, which contains a diode for which we can assume the relationship between current and voltage is i=i0eav. this is the same type of device that is used as a solar cell in the solar cell lab. compute vo as a function of vs, rs, i0, and a in this circuit. assume ideal op-amp behavior. (b)suppose you are given 4 ideal op amps, 3 diodes for which i=i0eav, and an unlimited number of resistors (of any value you choose). assume i0=1×10-7a and a=40. construct a circuit that takes two input voltages, v1 and v2, and generates an output vo=10v1v2.