please help me to solve this calculus question this subject is called engineering maths please solve it

You are assigned to monitor the operation of water tank for the ABC company during your internship placement. It is assumed that the water discharged from the tank is given by f ( x ) = ex-1 - v(2 + 3 ) , where x is the pressure applied in Pascal (Pa) and f(x) is the amount of water discharged in m3 from the tank per-hour. Calculate the rate of water discharged when the pressure of 3 Pa is used. If the pressures inside the tank are gradually increased from 2 to 10 Pa for 8 hours, calculate the total volume of water discharge during that 8 hours. Starting with a step size h = 2 hours estimate Q2(a) and Q2(b) respectively with TWO (2) different numerical methods. Calculate the true percent relative error (&) in each estimate. Repeat the computation by reducing the value of h monotonically until the &: