In terms of ben's place in the big meet, what is his marginal productivity of the number of yards he practices? is there diminishing marginal productivity of practice yards? ben's marginal productivity of increasing practice yards from 15 comma 000 yards to 30 comma 000 yards is . 872 swim meet places, and his marginal productivity of increasing practice yards from 30 comma 000 yards to 45 comma 000 yards is . 412 swim meet places. (enter numeric responses using integers.)