An approximate formula for a boundary layer over a flat plate is

u$($y$)=$Usin$((\backslash$pi y$)/(2\backslash$delta $))$

where U$=68\mathrm{.}0($m$)/($s$),$y is the distance from the wall, where y$=0$ at the wall, and the boundary layer thickness $\backslash$delta is $0\mathrm{.}106$ inches. If the viscosity of the gas is $2$e$-5($kg$)/($ms$)$ calculate