I think there was a very well written post on this subject in the past. You might want to search the old posts first. In short, lump sum is the present value of the single life monthly pension. The interest rate used for present value calculation is the IRS lump sum minimum 3 segment rates. Ford uses August rates of this year for next year's lump sum calculation. As IRS rates go up, the lump sum payout reduces. You can get this year and next year's payout in Sept time frame from NESC. The present value calculation involves your age, monthly pension, etc. So you will not get an exact number by asking in this site.
Monthly pension is not known to link to interest rate. The calculation of your pension is documented in general retirement plan handbook. It is based on your salary, years of services, age and option you pick.