Carmen wants to open a special savings account through her work. If Carmen invests $7,000 at 6 percent simple annual interest in January, and no other money is added to or removed from the account, which of the following is true?

Indicate all possible values.

a. At the end of April, Carmen will have earned $105 in interest.

b. At the end of the year, Carmen will have earned $420 in interest.

c. At the end of six months, Carmen will have earned $35 in interest.

d. At the end of three months, Carmen will have $7,105 in the account.