Can I get some detailed explanation and answer for this question?

Trade weighted exchange rate.The spreadsheet Trade Weighted Exchange Rate has trade shares for the 8 largest US trading partners and their exchange rates in 2010 and 2021 (made up).Calculate an index of the trade weighted exchange rate, using these numbers, with base = 100 in 2010 for 2010 and 2021.Use Excel, don't calculate by hand.

Trade Weighted Exchange Rate Country Ti/T Ei 2010 Ei 2021 China 0.23 0.1613 0.1568 Canada 0.22 0.7400 0.7813 Mexico 0.21 0.0714 0.0541 Eurozone 0.18 1.3200 1.1845 Japan 0.08 0.0111 0.0091 S Korea 0.03 0.0011 0.0009 UK 0.03 1.5200 1.2796 India 0.02 0.0200 0.0136 Total 1.00 Index