Isabelle has $84.00 in her account on sunday. over the next week, she makes the following changes to her balance via deposits and purchases: day debit ($) credit ($) monday 22.35 --- tuesday 47.60 10.29 wednesday 15.44 --- thursday 11.25 --- friday 9.78 22.69 saturday 30.54 18.86 on which day or days does isabelle get charged an overdraft fee?
i. thursday
ii. friday
iii. saturday
a. i only
b. i and iii
c. ii and iii
d. iii only