Barbara wants to accumulate $25000 by the end of 4 years. She starts making quarterly deposits in her investment account, which pays J4=6%. A) Determine the size of quarterly payments. B) After 2...

Barbara wants to accumulate $25000 by the end of 4 years. She starts making quarterly deposits in her investment account, which pays J4=6%.

A) Determine the size of quarterly payments.

B) After 2 years, the rate of return changes to J4=8%. Determine the size of the quarterly deposits now required if the $25000 goal is to be met.