If it's an essay, I would start by summarising the Greek crisis and the role the IMF has played up to now (alongside the role of the EU central bank) Then consider whether these have been successful; consider the arguments for continuing to bail out Greece followed by the arguments against. I'd then draw a conclusion based on what you and the experts feel is the best way forward.
If it is an essay it would help to say what level you are working at. The information required for a year 9 piece of homework is different to that required for a degree dissertation or for an article to go in the FT.
If a detailed analysis is needed I think you need to spend a few days researching the IMF's role, the success of support to date, the IMF's latest stance, the other financing options available and the views of expert commentators.
Good luck