QUESTION 29 In window coordinates, which of the following is true? Positions are measured in pixels with the origin at the upper left corner so that positive y values are down Positions are measured in pocels with the origin at the upper right corner so that positive y values are down Positions are measured in pocels with the origin at the lower-left corner so that positive y values are up. Positions are measured in pocels with the origin at the upper-right corner so that positive y values are up QUESTION 30 Check all features that shall be included in a good program. A variety ofmethods for entering and displaying informatio Tolerance for user errors Feedback to the user A variety of interactive devices on the display QUESTION 31 The pipeline approach to image generation is nonphysical. What are the main advantages and disadvantages of such a nonphysical approach T T TT %DOQ . Paragraph E Arial EEE 3 (12pt) E. E. T. T' T, 2 2