Write a MATLAB code for the following problem

A tank of $2\mathrm{.}3$m$^3$ capacity contains $620$ kg of liquid water at $266$ C in equallibrium with its vapor which fills the rest of the tank. A quantity of $990$ kg of water at $65$ C is pumped into the tank. Find the following process characteristics: Pressure $($in bar$)$ in the tank; Heat $($in KJ$)$ must be added during this process for the temperature in the tank not to change, and the final total mass $($in kg$)$ of water $($liquid and vapor$)$ in the tank.