On February 1. Arshak's investment account has a balance of $19,800. He deposited $1,100 on April 1 and $2,600 on May 1. He withdrew $8.300 on July 1. On November 1, Ubalds balance was $14,820. Find Arshak's approximate dollar-weighted annual yield for this nine-month period using formula 2.6.5 in your textbook.