I need to produce a related structure of the molecular features of carboxyli acid, size hydrocarbon group on ester and distance between oxygeeb atom joined to the ring and -oh group of the carboxylic acid?

I have got no ideas on where to start.

Start by rephrasing your question and getting the spelling right. What do you mean by "producing a related structure?" What do you mean by "size hydrocarbon group on ester?"

Are you supposed to create a 3-D scale model of the molecule?