In a certain audio recording system, it is desired to be able tomix two signals v1 and v2 and provide an adjustment for the levelof each. The desired sum v(output) will be of the formv(o)=k1v1+k2v2 where k1 ans k2 are each adjustable from 0 to +10. Two 0-100K ohm potentiometers are available. Using no more thanthree op-amps, design a circuit to perform the desired function.The input impedance of each channel should be no less than 10K ohm.