Pairwise disjointness test

Determine whether the following grammar is an LL grammar by performing the pairwise disjointness test, showing the FIRST sets of each RHS of each nonterminal:
A - aAb | bBB
B - aB | bA | Cc
C - aaB | c | caB
In the above productions upper case letters are nonterminals and lower case letters are terminal symbols.
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