Luke 5-7

This passage really opened some questions to me. Questions that I need to explore. First was why did Jesus choose four men who already worked well together; Andrew, Peter, James, and John? (Luke 5:10-11)
In Luke 6:6-11 Jesus sees a man with a withered hand in the synagogue gather and healed him. I wonder if the Jewish leaders grilled him like they did the man born blind who's sight Jesus restored? Of did he respond like the cripple Jesus healed at Bethesdia?
In the first part of Luke 7 why did the Jewish leaders feel the centurian was worth of Jesus attention (verse 4), but the centurian himself did not?(verse 6)
Stuart