$6\mathrm{.}69$ For the siphon in Fig. $6\mathrm{.}26,$ calculate $($a$)$ the volume flow rate of water through the nozzle and $($b$)$ the pressure at points A and B $.$ The distances $x=4\mathrm{.}6m$ and $Y=0\mathrm{.}90m.$

FIGURE $6\mathrm{.}26$ Problems $6\mathrm{.}69,6\mathrm{.}70,$ and $6\mathrm{.}71.$