A vertical rectangular plate with a width of $12$ m and a height of $12$ m is located $4$ m below

a water surface. The resultant hydrostatic force on this plate is:

a$.,39240kN$

$(1$ mark$)$

b$.98100$ kN

c$.,14126\mathrm{.}4kN$

d$.18835\mathrm{.}2$ kN