A function $h$ is defined by $h(x)=c^x+d$, where $c$ and $d$ are constants and $c>0$. The graph of $y=h(x)$ has a $y$-intercept at $(0,\frac{1}{2})$ and passes through the point $(2,\frac{17}{2})$. What is the value of $c\cdot d$?