The interest I given principal P, rate R time T is given by:
![I=(PRT)/(100)](https://img.qammunity.org/2023/formulas/mathematics/college/ow8jstobgep8k2tjmvzz2thz894ax97bk5.png)
Substitute P = 22500, R = 3.5, and T=5.5 into the formula:
![I=(22500*3.5*5.5)/(100)=4331.25](https://img.qammunity.org/2023/formulas/mathematics/college/aeqmo5q8tprzchiikqna09t88dgcodkzxw.png)
Therefore, the interest is $4331.25.
The closing account balance is given by:
![P+I=22500+4331.25=26831.25](https://img.qammunity.org/2023/formulas/mathematics/college/9192xsne3oxnubg2jkgjes0mggw42wzz15.png)
The required interest is $4331.25 and the value of the account when he closed it is 26831.25