Marinada '21

[lang=hr] Slikar uči slikati u perspektivi. Kako bi to postigao, crta LijepuStvar$^\text{(TM)}$ pomoću stakla s jednim okom zatvorenim. Staklo se nalazi u $XZ$ ravnini, LijepaStvar$^\text{(TM)}$ u točki $(0, 20, -20)$, a slikarovo oko u točki $(0,-5,0)$. Odredite točku na staklu u kojoj je slikar naslikao LIjepuStvar$^\text{(TM)}$. \\ Odgovor napišite kao uređenu trojku koordinata, npr. "(1,2,3)" bez navodnika. [/lang] [lang=en] An artist is learning to use perspective. In order to achieve this, he is painting a FabulousObject$^\text{(TM)}$ on pane of glass with one eye closed. The glass falls along the $XZ$ plane, the FabulousObject$^\text{(TM)}$ is located at $(0, 20, -20)$ and the artist's eye at $(0,-5,0)$. Determine the point on the pane of glass on which the artist painted the FabulousObject$^\text{(TM)}$ \\ Write the answer as an ordered triple of coordinates, e.g. '(1,2,3)' without quotes. [/lang]