Box A contains three times as many marbles as Box B. Box C contains half as many marbles as Box B. There are 36 more marbles in Box A than in Box B. a)How many

Box A contains three times as many marbles as Box B.
Box C contains half as many marbles as Box B.
There are 36 more marbles in Box A than in Box B.
a)How many marbles are there in Box B?
b)How many marbles are there in Box C?
c)How many marbles are there in all?​