H E L P A S A P ! ! !

A function f has a horizontal asymptote of y=-4, a vertical asymptote of x=3 and an x-intercept at (1,0)

Part (a): Let f be of the form: f(x)=(ax+b)/(x+c).
Find an expression for f(x)

Part (b): Let f be of the form: f(x)=(rx+s)/(2x+t).
Find an expression for f(x)