Given the following hypothetical data (in millions of naira):

1.    gross private domestic investment        N59
2.    contributors for social insurance           N8
3.    interest paid by customers                  N3
4.    personal consumption expenditures       N206
5.    transfer payments                             N20
6.    undistributed corporate profits             N13
7.    indirect business taxes                       N25
8.    net exports of goods and services        N4
9.    capital consumption allowances            N21
10.    government purchase or goods and services    N59
11.    corporate income tax                                   N22
12.    personal taxes non-tax payments                   N29

Calculate

a)    gross national product
b)    net national product
c)    national income
d)    personal income
e)    disposable income