What is the 20-year Maturity Risk Premium (rmp)?

What is the A (single-A rated corporate bond) Default Risk Premium (rdp)?

Security Rating Treasury Face Maturity Value 1 year $ 1,000 Coupon Market Rate Price 0.00% $ 968.99 Treasury 3 years $ 1,000 1.90% $ 939.06 Treasury 5 years $ 1,000 4.30% $ 932.42 Treasury 10 years $ 1,000 6.80% $1,007.12 Treasury 20 years $ 1,000 6.60% $ 908.25 Corp A A 5 years $ 1,000 8.10% $1,000.00 Corp B BB 10 years $ 1,000 7.90% $ 859.88 Corp C AA 20 years $ 1,000 8.50% $ 972.22