please help solve

Calculate the annual \% retum from the following ten capital gain problems. 1. An investor bought $15,000 worth of McDonald's shares 5 years ago, and today they are worth $30,000. 2. An investor bought $35,000 worth of Wal-Mart shares 10 years .. -ago, and today they are worth $60,000. 3: An investor, bought $70,000 worth of Wells Fargo shares 20 years ago, and today they are worth $150,000. 4. An investor bought $15,000 worth of Nike shares 15 years ago, - and today they are worth $60,000. 5. An investor bought $9,000 worth of Vanguards Wellington mutual fund 12 years ago, and today they are worth $20,000. 6. An investor bought $30,000 worth of Home Depot 25 years ago, and today they are worth $85,000. 7. An investor bought $80,000 worth of Best Buy shares 5 years ago, and today they are worth $50,000. 8. An investor bought $115,000 worth of J.C. Penney shares 30 years ago, and today they are worth $15,000. 9. An investor bought $100,000 worth of Radio Shack shares 25 years ago, and today they are worth $25,000. 10. An investor bought $150,000 worth of Tiger company shares 22 years ago, and today they are worth $20,000. 11. An investor bought $80,000 worth of Leopard company shares 20 years ago, and today they are worth $12,000. 12. An investor bought $40,000 worth of XYX company shares 15 years ago, and today they are worth $18,000