Anthony and Michelle Constantino just got married and received $$$$20,000$ in cash gifts for their wedding. How much will they have on their $25$th anniversary if they place half of this money in a$$ fixed$-$rate investment earning $8$ percent compounded$$ annually? Would the future value be larger or smaller if the compounding period was $6$ months? How much more or less would they have earned with this shorter compounding$$ period?