5. [12pts] Consider the circuit shown below (a) Please draw an equivalent circuit without using an…

5. [12pts] Consider the circuit shown below (a) Please draw an equivalent circuit without using an opamp so that vo/vs are the same. You may use independent sources.8pts) 2 R1 Vo (b) What is the purpose of this circut? 4pts) (C2pts if incorrect) 1) Low-pass filter2) High-pass filter 3) Notch-filter 4) Band-pass filter