Crystal Report question - thanks

Crystal Report - I want to create two sections (Details). One of them shows two fields from table A ( it will show total record of 2 from the table A) and the other shows two fields from table B ( it will show total record of 3 from the table B). The output is as follows:

Section A (from table A)

------------

SummValue AmountA
12 ---------- 10
13 ---------- 11

---------------------

Section B (from table B)


--------------------
DepNo AmountB
2 ---------- 34
4 ---------- 44
3 ---------- 45
-------------------

Please tell me how to do it. I don't know how to create two sets of 'header - Details - footer' to do it.

note: Section B must be put under Section A