The final solution of the Hitchhiker's problem #5

The recent survey [2] nicknamed "Hitchhiker's Guide" has ra ised the rating of quasi-copula problems in the dependence model ing community in spite of the lack of statistical interpretation of quasi-co pulas. In our previous work we addressed the question of extreme values of the mass d istribution associated with a mutidimensional quasi-copulas. Using li near programming approach we were able to settle [2, Open Problem 5] up to d = 17 and disprove a recent conjecture from [25] on solution to that problem. In this note we use an analytical approach to provide a complete answer to the or iginal question.