Bobbi invests the money he has saved in an investment fund at the bank. the fund pays him interest each month according to the following sequence $0,$10,$20,$30,… meaning he received $0 in interest at month 0, $10 in interest after the first month, $20 in interest after the second month, and so on. if f(n) represents the sequence, determine the amount of interest he will receive after 12 months. enter the value of f(n) at f(12). $ [blank] −−−−−−