Questions are in the attached document

Question The techniques for calculating the income elasticity of demand and the cross price elasticity of demand are the same as illustrated . we assume value for all the independent variables, except the one of intrest , then calculate elasticity for a given value of the variable intrest in the quetion attached.An individual has the following demand function for gasoline: QD gas - 15-3Pp + 0.021 + 0.11Pay -0,008P 2.. where income and car price are measured in thousands, and the price of bus travel is measured in average dollars per 100 miles traveled Assuming the average automobile price is $22,000, income is $40,000, the price of bus travel is $25, and the price of gasoline is $3, calculate and interpret the income elasticity of gasoline demand and the cross price elasticity of gasoline dernand with respect to the price of bus travel