Calculating Interest Rate. Showing$/$explaining all of your work, find the interest rate implied by the following combinations of present and future values:

Scenario Years Present Value Future Value

A $10$ $$400$ $$684$

B $3$ $$187$ $$249$

C $6$ $$260$ $$300$

A$.$ For scenario A$,$ the interest rate is:

B$.$ For scenario B$,$ the interest rate is:

C$.$ For scenario C$,$ the interest rate is: