A battery manufacturer produces a large number of models of lithium$-$ion batteries for use in computers and other electronic devices. The products are introduced at different times and follow different demand processes. The company wishes to determine whether some of theproducts can serve as leading indicators for the rest of the products. The file batteries.xlsx contains historical demand data for $25$ products for the past $26$ weeks. Using the correlation based algorithm for finding leading indicators that we discussed in class with parameters kmin $=3,$ kmax $=9,$ and $\backslash$rho min $=0\mathrm{.}85,$ determine all pairs $($i$,$ k$)$ such that product i is a leading indicator with lag k$.$You are of course not expected to do the computations by hand. Please use Excel or any solver of your choice. You may not submit your spreadsheet or code but you do need to write down the final answer and explain the approach and what software you used. Please use the image as a refernce to the batteries.xlsx file.