leftmost derivation

Given the following grammar for {c^m+na^mb^n | m, n Element of N}, I claim it is an LL(1) grammar. S rightarrow cSb|T; T rightarrow cTa|^My justification is that I can build a leftmost derivation for the string cccabb by examining only one input symbol for each step of the derivation. The leftmost derivation is shown below. If you think my claim is true, mark the true box below. Otherwise, mark the false box and give your reason in the box below the true and false boxes