Question:
Ali, Banu, Caixuan and Dave shared a bag of beads.
Ali had 1/2 as many beads as Banu.
The total number of beads Ali and Banu had was 3/5 the number of beads Caixuan had.
Dave had 2/5 the total number of beads the four children had.
Dave had 52 beads more than Ali.
(a) What fraction of the beads did Banu have?
(b) How many beads did the children have altogether?