Only need help with question c and d$.$Thank you.

A turbine is to be installed in a creek where it is possible obtain a head of $2m$ above the exit to the turbine. The creek is estimated to have a flow rate of $0\mathrm{.}2m^3{s}^{-1}.$ Calculate the power output of the turbine assuming no losses $($including no friction losses$),$ using a density of water of $1000kg{m}^{-3}$ and an exit velocity from the turbine of $1\mathrm{.}6m{s}^{-1}.$ You must draw a fully labelled sketch diagram as part of your answer. $($Answer $=3\mathrm{.}7k)$

$($c$)$ Calculate the diameter of the channel receiving the water, i$.$e$.$ after the turbine, assuming that it has a square cross$-$section to the water flow.

$($d$)$ Different designs are to be considered for the turbine system and one possibility is to split the flow in the creek into two equal$-$flow streams, and route one of the streams $($containing a mesh to protect the turbine system$)$ through a pipe ending in a nozzle $8cm$ in diameter, with the jet impacting on turbine buckets $($i$.$e$.$ cups designed to reverse the impinging flow$).$ Draw a sketch diagram of this arrangement, appropriate for a momentum calculation, and calculate the maximum reaction force on a turbine bucket $($i$.$e$.$ ignore the rotation of the bucket$).$ Do start your analysis with the usual momentum equation and explain why you ignore any of its terms in this analysis.