With a positive attitude and a little determination, you are capable of doing anything.
With a positive attitude and a little determination, you are capable to do anything.
With a positive attitude and a little determination, you are capable of doing anything.
With a positive attitude and a little determination, you are capable to do anything.
The adjective "capable" idiomatically takes "of + [gerund]," never an infinitive. Students sometimes confuse this idiom with the idiom for "able", which always takes an infinitive.