An investor deposits 50 in an investment account on January 1. The following summarizes the activity in the account during the year Date March 15 Value Immediately Before Deposit 40 Deposit 20 June 1 80 80 October 1 175 75 On June 30, the value of the account is 157.50. On December 31, the value of the account is X. Using the time weighted method, the equivalent annual effective yield during the first 6 months is equal to the time weighted) annual effective yield during the entire 1-year period. Calculate X. O a. 235.50 b. 236.25 O c. 237.00 d. 237.75 O e. 234.75