Based on this information, write a function that does the following: $1.)$ Takes as inputs the following values: a$.,1$ and $,2$ b$.1,2,3,$ and $42.)$ Uses this information to set up a coefficient matrix A and column vector b such that the system can be written in the form $=.3.)$ Solves the system of equations. $4.)$ Returns the resulting currents: $1,2,$ and $3$ in amperes.