4.20 On June 1, 2016, an investment account is worth $200. On November 1,2016, the value has increased to $225 and X is deposited into the account. On April 1, 2017, the balance becomes $270, and $90 is withdrawn. On June 1, 2017, the account balance is $168. The TWRR of the account is 5%. Find the DWRR of the account.