The decision to replace an existing machine with a new machine is typically a capital budgeting decision.

So, the correct answer is:

(4) Capital budgeting decision

Capital budgeting involves evaluating and selecting long-term investment projects like replacing machinery, which can have a significant impact on the company's financial performance and future cash flows.

Let's briefly discuss why the other options are incorrect:

Funds management decision: Funds management decisions are concerned with managing the day-to-day cash flows and short-term financial operations of a company, such as working capital management and cash flow forecasting. Replacing a machine with a new one is a longer-term investment and not a short-term funds management decision.

Dividend decision: The dividend decision involves determining how much of the company's profits should be distributed to shareholders as dividends and how much should be retained for reinvestment in the business. It is not directly related to the decision to replace a machine.

Working capital decision: Working capital decisions pertain to managing a company's current assets and liabilities to ensure that there is enough liquidity to support its day-to-day operations. Replacing a machine is more of a capital expenditure decision that impacts the company's long-term asset base rather than its working capital.