This is literally what the design contract is for. You can't answer any of these questions without actually developing a properly detailed proposal. And they can't get those details without actually designing a route, siting stations, look at land assembly, etc. This is not a construction contract. It's a design contract. They will present options to the government at the end, including non-government financing (that's why CDPQ Infra is there), and the government can then decide what they want to go ahead with. Including not building anything.