Question [4]: (7 points) On page 46 in the notes, with respect to the aggregation of the netputs of firms, I claim that 'since there are no income effects' aggregation is not a problem. It is not wrong, but on reading this again I think I could have phrased that one better. So let's ignore welfare questions. Outline two key 'problems' encountered in aggregating on the consumer side, and why neither occurs on the producer side. (short argument)