exam Maths Puzzle Numerical Ability

I keep getting stuck on the following word problem. Can you please help :0)

According to data from the U.S. Department of Agriculture, the annual per capital consumption of red

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how do you decide which variablleshould be on the x-axis and which should be on the y-axis What are they asking me when they ask Re(2e^((i*pi)/3))? Same question for Im(some numbers). The Re() and Im() notation are new. It seems to me that I should drop all parts with