Hints:
- Define x as an array using linspace after defining min and max value of x.
- Define t as an array using linspace after defining min and max value of t.
- Get matrices X, T from x, t using the functio meshgrid.
- Fix the value of n (may be up to 100 or more). Note that we cannot take infinity.
- Initialize the sum as zeros.
- Run a loop with index n and write the formula which you have given.
- Use surf to plot the data.