There's only an answer available to your questions on slide 8–...

There's only an answer available to your questions on slide 8– "is the entire product sold into the offtake and what are the general terms. What was the actual grade exported?"
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"All product produced by WDR in first 5 years is pre-sold to Noble at prevailing Platts spot price at the time" - previous investor presos

"WDR has been able to export 276,999 tonnes at a grade of circa 60.2% Fe" - page 6 of the quarterly (circa! to the decimal place)
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The rest of your questions I agree are valid ones to ask!
They don't appear to have a defined reserve, however the resource would last 10 years at least (that's not much comfort!)