Answer:
The investor's rate of return is 17%
Explanation:
The total amount invested was $10000,which implied 400shares($10000/25)
The investment was realized for $28 each and total proceeds is $28*400 i.e $11200
The investor has to pay interest of 7% on the $5000 borrowed
7%*$5000=$350
When the interest is taken away from the proceeds,$10,850 is left($11200-$350)
Hence, rate of return on investment is the return earned $850($10850-$10000) divided the initial cash provided by the investor($5000)
i.e $850/$5000*100=17%