Identify the usual order of net worth calculations used to determine stolen funds.

a. Find income, find net worth, find the net worth increase, find the funds from unknown sources
b. Find net worth, find income, find the funds from known sources, find the net worth increase
c. Find net worth, find the net worth increase, find the funds from known sources, find income
d. Find net worth, find the net worth increase, find income, find the funds from unknown sources