$5 MTT, on button with 4BB, 6 limpers ...

[Stepping Stone]

~100 ppl left out of ~1500 in $5 MTT, down to 4BB, on button, 6 limpers, table seems very loose and passive (the only solid player is in cutoff)

1. What range of hands
a. can fold here?
b. should just shove here?

2. K6cc a clear shove? (getting at least 2.5:1 with one caller)