We may redeem any of the outstanding 2020 fixed rate notes at any time prior to the maturity date of the 2020 fixed rate notes, any of the outstanding 2021 fixed rate notes at any time prior to the maturity date of the 2021 notes, any of the outstanding 2023 notes at any time prior to May 26, 2023, any of the outstanding 2025 notes at any time prior to April 26, 2025, any of the outstanding 2028 notes at any time prior to March 26, 2028, any of the outstanding 2038 notes at any time prior to December 28, 2037 and any of the outstanding 2048 notes at any time prior to December 29, 2047, in each case, at our option and, as to each series of notes, as a whole or in part, at a redemption price equal to the greater of:

•100% of the principal amount of the notes to be redeemed, plus any accrued and unpaid interest to, but excluding, the redemption date; and

•the sum of the present values of the Remaining Scheduled Payments (as defined below), plus any accrued and unpaid interest to, but excluding, the redemption date.

In determining the present value of the Remaining Scheduled Payments, we will discount such payments to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) using a discount rate equal to the Applicable Treasury Rate plus, in the case of the2020 fixed rate notes, 5 basis points, in the case of the 2021 fixed rate notes, 10 basis points, in the case of the 2023 notes, 10 basis points, in the case of the 2025 notes, 12.5 basis points, in the case of the 2028 notes, 12.5 basis points, in the case of the 2038 notes, 15 basis points, and in the case of the 2048 notes, 20 basis points.