$9\mathrm{.}1$ through $9\mathrm{.}4$ For the loading shown, determine $($a$)$ the equation of the elastic curve for the cantilever beam $\backslash ($ A B $\backslash ),($b$)$ the deflection at the free end, $($c$)$ the slope at the free end.

$\backslash ($ y$\_\{1\}\backslash )$

Fig. P$9\mathrm{.}4$