Ann: Operational Update - Sapphire 5L3 drilled inseam to 1350m, page-13

There's been a wealth of speculation about these matters over the many Blue years. Plenty of posters have claimed to have the answers to your original questions, and usually coupled that with an insistence that Blue's time had come... they themselves have mostly long since come and gone... Good luck with getting the Board to articulate a long term plan.

One prolific poster on Blue claimed previously that one more decent offtake MOU would justify the pipeline. That MOU has not eventuated. For what it's worth, and my guess is about as good as anyone's (or in the words of the philosopher Lydon, "I could be wrong, I could be right") in regards to your 4th question; the government feasibility study is to fund the pipeline. I'm almost certain it's not your second option of, "govt funded research so a 3rd party can build (ie, APA)" Whether the state would partner APA in such a venture, again is idle speculation.