question asking for the future value of the equivalent of $115 deposited
monthly for 21 months, on 1st day of each month...
If you don't know enough to clarify it, then ask whoever gave you the
problem to clarify it.
As it stands, the cash flows are:
jan 1/01 : 0
feb 1/01 : 0
mar 1/01 : 0
apr 1/01 : 115
may 1/01: 115
nov 1/02 : 115
dec 1/02 : 115
dec 31/02 : ? : your question asks for a value at this point ?
Also, can you tell us why you have no idea; bad teacher? Missed classes?