1 Define personal income ?Ans = It is the sum of all the incomes received by all the households during a given period say financial year. 2 Mathematical formula for personal income is ?Ans ,PI = NI + income received but not earned - income earned but not received3 What is PDI define it ?Ans = measures the after-tax income of persons and nonprofit corporations.Or If the personal tax payments and Non tax payments are deducted from personal income PDI is obtained. 4 Define mathematical formula for PDI ?Ans = PI - Personal tax payments - Non tax payments 5 What is the full form of PCI ?Ans = Per capita...