nota)   to estimate tax collectionsb)   to track the magnitude of recessionsc)   to measure the happiness of peopled)   to estimate the productive capacity of the country in case of ware)   to compare living standards in different countries·        a1)Personal consumption expenditure·        a2)This would not be included as part of GDP·        a3)Gross private domestic investment·       b1)Personal consumption expenditures·        b2)This would not be included as part of GDP·        b3)Gross private domestic investment·      c1)  Personal consumption expenditures ·       c2) Gross private domestic investment·       c3) This would not be included as part of GDPResidential investmentPersonal consumptionGovernment consumption and investmentNonresidential investment