In the op amp circuit given below, find the closed-loop gain and phase shift of the output voltage with respect to the input voltage if C1 = C2 = 1 nF, R1 = R2 = 100 kΩ, R3 = 20 kΩ, R4 = 23 kΩ, and ω = 2000 rad/s. (VS = 10 V) Please report your answer so the magnitude is positive and all angles are in the range of negative 180 degrees to positive 180 degrees. VO/VS = < ∘