Consider three potential locations $(-37\mathrm{.}945,143\mathrm{.}773$;$-39\mathrm{.}611,146\mathrm{.}400$;$-37\mathrm{.}907,145\mathrm{.}136)$ of a wind turbine. Estimate the roughness length for wind from the north, east, south and west for each location. $($a$)$ Consider distances relevant to a hub height of $150$ metres. $($b$)$ Assume that each location and direction has the same wind speed of $(5$ and $10\frac{m}{s})$ at a height of $500$ metres, then estimate the power available at a hub height of $150$ metres for those cases. $($c$)$ Which site is most suitable for the turbine, consider only available energy? $($d$)$ What other factors might be relevant to the suitability of each site to install a wind turbine? $($e$)$ If the hub$-$height was reduced to $50$ metres, what would that mean for the available power at each site?