Please show work

The index consists of the following securities and has an index divisor of 3.0. What is the price-weighted index return assuming a 1-year time period? What is the price-weighted index return assuming a 271 day time period? If the time period was increased to 13 months, what would the price-weighted index return be? Index Stock D E F Shares OS 1,000 4,000 3,000 Beginning Share Price $26 $30 $19 Ending Share Price $32 $28 $22