4. (20 pts) Find $v_o(t)$ for $t \ge 0$. Also, answer parts a-d.
a. For $t \ge 0$, is the resulting circuit serial or parallel RLC? Note if parallel,
express the differential equation describing the circuit in terms of the
common voltage otherwise express the differential equation in terms of the
common current.
b. Based on the values of R, L, and C, what will be the assumed structure of
the solution?
c. What are the values of $v_c(0^-)$ and $i_L(0^-)$?
d. Clearly outline steps to determine $v_o(t)$.