For the following question, consider an individual with autonomous consumption of $400, who spends $800 when their income is $500. (a) Calculate how much money the individual will save when their income is $2000. (b) Draw a graph demonstrating the consumer's savings function. Include both the intercept and the slope of the function. (c) On your graph from (b), demonstrate what would happen if the individual received a promotion to a higher-salary position