yield rate

An investment account began the year with $10,000 and ended it with $12,100. Deposits of $1000 (end month 1) and $300 (end of month 8) were made and the investor made a withdrawal of $700 at the end of month five. Balances before transactions where $10250 after one month, $11,130 after five months and $11,040 after eight months. Find the dollar weighted (simple interest) yield rate and the time weighted yield of the account for this year.