A tank $($ length $5$ m $,$ depth $2$ m $,$ width $3$ m $)$ contains oil $($relative density $0\mathrm{.}9)$ up to a

depth of $0\mathrm{.}9$ m $.$ The tank accelerates along the length in a horizontal direction at a

constant value of $3\frac{m}{s^2},$ find the new position of oil surface at front and rear end,

and pressures at the bottom of the tank at front and rear end.