$($A$)$ Use Excel to draw the velocity distribution at $d\frac{p}{d}x=0\mathrm{.}6P\frac{a}{m}$;$=0\mathrm{.}001$ Pa$.$s ;$H=0\mathrm{.}15m$; and $U_t=0\mathrm{.}5\frac{m}{s}.$

$($B$)$ From the graph, can you estimate where the location $(y=??)$ with zero velocity?