$3)$ The annual highest waves recorded at deep water offshore of a fishery harbor you are designing at the Black Sea coast are given below. Compute the heights of the design waves with $75-$year andThe annual highest waves recorded at deep water offshore of a fishery harbor you are designing at

the Black Sea coast are given below. Compute the heights of the design waves with $75-$year and

$150-$year return periods. If necessary, take standard deviation of these wave heights as $0\mathrm{.}69m.$

$150-$year return periods. If necessary, take standard deviation of these wave heights as $0\mathrm{.}69$ m$.$