Graphics Interpretation and Table Analysis are generally the "easier" sections of IR. Of course, there can be traps and mistakes that you might make that screw you up in these sections - but generally they don't require as much brainpower as Two-Part Analysis or Multi-source Reasoning.

For Graphics - you might have to look at understanding various charts, figure out subsections of graphs within others, calculate millions divided by thousands (pay attention to decimals), and all kinds of charts. With table analysis, there are a lot of CONDITIONS that require you to figure out the average/median for certain subsets of data.

For Two-Part Analysis - the verbal ones can resemble Critical Reasoning on steroids - multiple steps to visualize and get the right answer. The Quant ones love to use units to add complexity to the problem and these require multiple steps to solve.

Multi-source Reasoning requires a lot of attention to detail and references to 2 or 3 sources of information. It resembles RC because of the "inference" questions but can also involve some math calculations as well.

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gmatpill ir e-book for more information