The figures below show the graphs of the exponential functions $f(x)$ and $g(x)$, and the linear function, $h(x)$. The function $f(x)$ has y-intercept $0.75$ and goes through the point $(1,3/2)$. The function $g(x)$ has y-intercept $6$ and goes through the point $(2,6/9)$. The function $h(x)$ has y-intercept $4$ and goes through the point $(a,a+4)$.

(a) Find a formula for $f(x) =$ help (formulas)
(b) Find a formula for $g(x) =$ help (formulas)
(c) Find a formula for $h(x) =$ help (formulas)

(d) Find the exact value(s) of $x$ such that $f(x)=g(x)$. If there is more than one solution, enter your answers as a comma separated list.
$x =$ help (numbers)