To enable iterative calculation in Excel, go to File $>>$ Options $>>$ Formulas and click on the box $"\backslash (\backslash$square $\backslash )$ Enable iterative calculation." Make sure that the $\backslash$# of iterations is $>100$ and the maximum allowable change is small $($i$.$e$.0\mathrm{.}001).($Note: This should only be done after you have entered all your equations $/$ formulas in the spreadsheet.$)$

According to your simulation, what is the temperature at the location $(\backslash (\backslash$mathbf$\{0.25$ m$\},\backslash$mathbf$\{0.5$ m$\}\backslash ))?$ Use the cell highlighted above for your comparison. Attach your spreadsheet which shows the solution in each cell and indicate the FDE equation$($s$)$ that you used to solve this problem.