A company must perform a maintenance project consisting of seven activities. The activities, their predecessors, and their respective time estimates are presented below: 
Using CPM, which activities make up the critical path?
Definitions:
Paid-In Capital
The total amount of money or value that shareholders have invested in a company through the purchase of its stock.
Retained Earnings
The part of a company's earnings that is reserved or saved, instead of being distributed as dividends to its shareholders.
Par Common Stock
The nominal or face value of a share of common stock, as specified in the corporate charter.
Paid-In Capital
The sum of funds a corporation has obtained from its investors through the sale of stock shares.
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