If you don't solve this problem correctly in $3$ tries, you can get a hint.

a$)$ Find the useful power output of an elevator motor that lifts a $\backslash (3675-\backslash$mathrm$\{$kg$\}\backslash )$ load a height of $48\mathrm{.}0$ m in $12\mathrm{.}0$ s $,$ if it also increases the speed from rest to $\backslash (8\mathrm{.}00\backslash$mathrm$\{$~m$\}/\backslash$mathrm$\{$s$\}\backslash ).$ Note that the total mass of the counterbalanced system is $13936$ kg $,$ so that only $3675$ kg is raised in height, but the full $13936$ kg i accelerated.W

b$)$ What does it cost$,$ if electricity is $\backslash (\backslash$$ $0\mathrm{.}071\backslash )$ per kW$.$h$?($ Give value to nearest cent $)$ dollars$/$h