[learner101]

Can someone please tell me how to go about this problem step by step.

The low resolution 70 eV electron ionization mass spectrum of a pure organic compound is
 given in the link below (peaks below m/z 24 have been omitted). The accuracy of the intensities may
 be assumed to be ±10% or 0.2 absolute, whichever is the greater.
 Identify the probable molecular ion and, giving your reasoning, deduce as much as you
 can about the structure of the compound. Indicate how the six peaks at m/z 27, 29, 54,
 79, 80 and 95 in the mass spectrum could be formed from your proposed structure(s).

 Refer to this picture please:
 http://i1269.photobucket.com/albums/jj581/learner101/42aad553.png

[fledarmus]

You need to start by taking your best shot at answering the question yourself.

[Arkcon]

You can also try to group those numbers in that image to try to see what they mean.  Obviously, its helpful to post an image of the output of a mass spec, but making an image of a group of numbers, instead of typing them into the forum posting for everyone to see, really does appear that you don't want to do any work at all.