A,C, and E are all together β¦
Another set is D and B
You could use 4 and 7 as the base
4*4=16 7*4=28
4*5=20 7*5=35
βββββββββββββββββ
2 and 3 are the base in the next set;
2*4=8 3*5=15
βββββββββββββββββ
Sorry if itβs confusing but I believe thatβs the answer