Water with a viscosity of $0\mathrm{.}8mN*\frac{s}{m^2}$ flows by gravity from a large reservoir at a high elevation

to an open tank through a $15m$ long stainless$-$steel pipe with a diameter of $3\mathrm{.}2cm$ and

roughness of $0\mathrm{.}0192mm.$ The pipe fittings in the pipe network include $3$ units of $90$ standard

elbows, $2$ units of fully open globe valves and $1$ unit of fully open ball valve. It is assumed that

the flow is steady and incompressible. Starting from a suitable sketch of the system and

constructing the Bernoulli's Equation, determine the elevation of the fluid level in the reservoir

with respect to the fluid level of the lower tank for a flow rate of $4\mathrm{.}0{10}^{-3}\frac{m^3}{s}.$ Subsequently,

calculate the pressure drop in kPa between these fluid levels.