Q=400-5 P +5 I +10 AWhere Q is quantity demanded per month in thousands P is pro

Q=400-5 P +5 I +10 AWhere Q is quantity demanded per month in thousands P is product
price I is an index of consumer income and A is advertising
expenditures per month in thousands. Assume that P=$200 I =100 and A=
20. Use the point formulas to complete the elasticity calculations
indicated below.(1) calculate quantity demanded.
(2) calculate the price elasticity of demand. Is demand elastic inelastic or unit elastic?
(3) calculate the income elasticity of demand. Is the good normal or inferior? Is it a necessity or a luxury?
(4) Calculate the advertising elasticity of demand.