Problem $2)$

EXPLAIN YOUR ANALYISIS AND REASONING FOR EACH STEP IN DETAIL

a$)$ Determine the expression for the voltage across the equivalent capacitance for $t>0.$

b$)$ If the switching function is reversed for each of the sources $($example $u(t)$ now becomes $u(-t)$ and vice versa$),$ how does the expression derived above change? Is the circuit time constant affected? Why?