I don't understand how to use Euler's method to solve the problem; never used it before. Please explain the steps required to solve the problem.

2) Apply the conservation of mass to simulate the level of liquid in a conical storage tank (see figure). The liquid flows in at a sinuspidal rate of Qin=3sin2(t) and flows out according to Qout=3(yyout)15Qout=0y>youtyyout where flow has units of m3/d and y= the elevation of the water surface above the bottom of the tank (in meters). Use Euler's method to solve for the depth y from t=0 to 10d with a step size of 0.5d. The parameter values are rtop=2.5m,ytop=4m, and you=1m. Assume that the level is initially below the outlet pipe with y(0)=0.8m