Iridium Corp. has spent $3.5 billion over the past decade developing a satellite-based telecommunication system. It is currently trying to decide whether to spend an additional 5356 million on the project. The firm expects that this outlay will finish the project and will generate cash flow of $15.2 million per year over the next 5 years. A competitor has offered $451 million for the satellites already in orbit. Classify the firm's outlays as sunk costs or opportunity costs, and specify the incremental cash flows. The $3.5 billion already spent is and it is (Select from the drop-down menus.) The $356 million is an incremental cash outflow and it is (Select from the drop-down menus.) The $15.2 million per year is a cash inflow and it is (Select from the drop-down menus.) The 5451 million offer for satellites is and it is (Select from the drop-down menus.) -irrelevant - relevant -sunk opportunity options