for plotting you can use any software.

4. Consider the case in which the initial temperature field is in the form of step function in an infinite domain. That is, T = T1 for x 0. We want to investigate how the transient temperature profile diffuses with respect to time. The governing equation is 2T = a at x2 - 0 with the step initial temperature profile 11 if - 0. We want to investigate how the transient temperature profile diffuses with respect to time. The governing equation is 2T = a at x2 - 0 with the step initial temperature profile 11 if -