A pair of time value of money questions: (a) The municipality of North Chester needs $35,000,000 in 30 years to replace their wastewater treatment plant. Assuming interest rate is 5% (accrued annually), how much money would this municipality need to invest today to have the money available for this project in 30 years?

(b) This investment proves too large for North Chester as a single lump sum. How much money would the municipality need to put back on an annual basis to ensure they have the $35,000,000 in 30 years, again assume the interest rate is 5% (accrued annually)

I need some clarification on part b. I am not sure how to do this. When posted before, there was really no explanation.