Answer:
Interest earned=$ 1722.24
New Balance of account=$6922.24
Explanation:
An account earns simple interest.
$5200 at 7.36% for 54 months.
The principal account (P) =$5200
R=7.36%
T=54 months=54/12 year=4.5 year.
Hence, simple interest(I) is calculated as:

Hence, interest earned=$ 1722.24
Hence, the new balance of the account is:
P+I
=5200+1722.24
=$ 6922.24.
Hence new balance of account=$ 6922.24