If the maximum wave height in a two$-$hour long wave record is $9m$ and the average period is $6s$;

$($a$)$ What is the value of significant wave height?

$($b$)$ How many waves would exceed $8\mathrm{.}5m$ height?

$($c$)$ What is the value of $H_{70}?$

$[2\%]$

$[3\%]$

$($d$)$ What is the value of $H_{\text{m}\text{a}\text{x}}$ in a three$-$hour long wave record?

$[5\%]$

$[5\%]$

$($e$)$ How many waves will exceed $H_{25}$ in a record of one$-$hour duration?

$[5\%]$