it$.($Round your answer to the nearest whole number. Use $9\mathrm{.}8\frac{m}{s^2}$ for the acceleration due to gravity. Assume that the weight density of this water is $1,000k\frac{g}{m^3}.)$

$($i$)$

$g{\displaystyle \underset{-7}{\overset{7}{}}}(\frac{y-49-y-5^2}{x})dy$~~$75$