Answer:Here are the calculations:1. Monthly payments starting 11 months from now:k = 11 months2. Quarterly payments starting 2 years from now:k = 2 years = 8 quarters (since quarterly payments)3. Semi-Annual payments starting 5 years from now:k = 5 years = 10 semi-annual periods4. Withdrawals starting 25 months from now:k = 25 months = 25/3 = 8.33 quarters (approximately)5. Payments every 4 months starting 4 years from now:k = 4 years = 12 periods (since payments every 4 months)In years, the periods of deferral are:1. k = 0.92 years2. k = 2 years3. k = 5 years4. k = 2.08 years5. k = 4 years