Computation of Amount at 16% Simple Interest:

Amount = Principal + Interest

Here,

Simple Interest = Principal*Rate*Time

= 6,850*16%*3 years and 8 months

= 6,850*16%*(3+8/12)

= 6,850*16%*3.6667

Simple Interest = 4,018.67

Amount = 6,850+4,018.67 = 10,868.67

Computation of Amount at 16% compounded quarterly:

Amount = Principal*(1+Rate/Number of Compounding Periods)^Number of Periods

= 6,850*(1+16%/4)^(3 years* 4 quarters + 8 months or 2 quarters)

= 6,850*(1+4%)^14

Amount = 11,861.98