If someone could help me solve this with clear steps to understand, it would be much appreciated. Thanks!

current total market value of index stocks x 100 base year total market value of index stocks Example: Consider an index including three tech stocks (one share for each) in year 1. In year 1 (base year), the prices of Google, Apple and Snapchat are $1, $2 and $3. The Apple stock splits 2-for-1, effective after year 2. In year 2, those prices become $2, $1 and $5 (1) Compute the capitalization-weighted index for year 2. (2) Is stock-split adjustment necessary in this case