Answer:
17.65% , 5.88%
Explanation:
If Price is $900 one year ahead,
future price = $900
current price = $850
yearly raise = 10% * (face value) = 0.1 * 1000 = $100
From Rate of return = (future price - current price + yearly raise)/current price
Rate of Return = (900 - 850 + 100)/850
Hence, Rate of Return = 17.65%
If Price is $700 one year ahead,
Similarly,
Rate of Return = (700 - 850 + 100)/850
Rate of Return = 5.88%