Solve the following parabolic equation $\frac{\text{d}\text{e}\text{l}\text{u}}{\text{d}\text{e}\text{l}\text{t}}=2\frac{de{l}^{2}u}{del{y}^2}$ and find the values of $u(y,t)$ at $y=2m$ and at $y=4m$ for the time at $t=2sec.$ The boundary conditions are given to be $u(0,t)=0=u(5,t)$ and $u(y,0)=\frac{5}{2}{y}^2-y$