1. Write a script file to do following problem The voltage difference Vo between points a and b in the Wheatstone bridge circuit is: Calculate the voltage difference when V 12 volts, R120 ohms, R 100 ohms, R220 ohms, and R4120 ohms. 2. Write a user-defined Matlab function to calculate the volume of sphere. Write a MATLAB script fi'e to plot the following signal: s e'sin(t).( including axis and title) 3