Question 935658
<pre>
Let P = Principal
    R = Interest rate per annum
    T = Duration of the loan
    I = Interest
   FV = Future Value
   PV = Present Value

a) 
First three years
FV = PV (1 + r)^t
FV = 1000 (1 + .08)^3
FV = 1259.71

Next four years
FV = PV (1 + r)^t
FV = 1259.71 (1 + .1025)^4
FV = 1861.17

Last three years
FV = PV (1 + r)^t
FV = 1861.17 (1 + .09)^3
FV = 2410.27

b)
2410.27 - 1000 = 1410.27
</pre>
The amount she accumulated in 10 years is $2410.27 and the total interest she earned in 10 years is $1410.27.