Provide an Excel worksheet illustrating the invariance principle of Section 1.1.2. To do this, simulate values of some independent r.v.’s, for example, exponential or uniform, construct sums S_k, and then the process X_t⁽ⁿ⁾ (consider only points t = k/n). Provide charts with the graphs of particular realizations of X_t⁽ⁿ⁾. Pay attention how the graphs look for large n.