Answer:
Total interest earned on the original deposit=$403.593
Explanation:
Total Interest earned after 6 years using compound Interest:

Where:
PV is the deposit amount
i is the interest Rate

FV=$4561.593
Total Interest earned after 6 years=FV-PV
Total Interest earned after 6 years=$4561.593-$2,700
Total Interest earned after 6 years=$1861.593
Total Interest earned after 6 years using single Interest:
Total Interest=$2,700*0.06*9
Total Interest =$1458
Total interest earned on the original deposit=Total Interest earned after 6 years-Total Interest
Total interest earned on the original deposit=$1861.593-$1458
Total interest earned on the original deposit=$403.593