Hi please actually help, some of yall wrote the water cycle and it made me want to sob so please besties I have to write e=an essay but just need to know how do the problem so I can expand xoxo me <3

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9