A company producing a very special type of musical instrument, the Alp horn, has close to a monopoly on the world market. Seeing an opportunity to earn money, several companies start to create substitutes such as the Rocky Mountain horn, the Sierra Nevada horn, the Andes horn and the Himalayas horn. What happens to the demand curve of the Alp horn

answer; the correct answer is (0.08);

the answer is either c or b, i cant be to sure tho.

answer; /// the above statement is (true);

you will have $2593.74 in 10 years if you set aside $1,000 at 10%

you will have $9321.91 in 20 years if you set aside $2000 at 8%

you will have $1469.32 in 5 years if you set aside $1000 at 8%

you will have $1296.87 in 10 years if you set aside $500 at 10%

you will have $239.66 in 15 years if you set aside $100 at 6%

you will have $4660.96 in 20 years if you set aside $1000 at 8%