The coordinates of $\Delta ABC$ are $A(0,0), \;B(8,0)$ and $C(3,5)$. What is the sum of the slopes of the three sides of the triangle ?

Question

$\begin{array}{1 1} (a)\; 0.66 \\ (b)\; 0.25 \\ (c)\; 0.15\\ (d)\; 0.75 \end{array}$