Spatial information systems: Sampe MCQ - Could you please provide the answer and detail why it is the case please - Thank you

Q3) Assuming that we use Z-buffering (Morton scan) as a scan order method for an 8X8 image, and calculate the Z-values by recursively assigning 0 to the left and bottom parts of the image and 1 to top and right (as indicated in the figure below), what does the binary code 0111 identify? a) The first pixel in the second row from the top b) The NE quadrant c) The NW quadrant d) The NW-NE subquadrant e) The last pixel in the image f) The NE-NW subquadrant Q4) Which of the following statements are correct? a) Quadtrees always provide better compression than run-length encoding b) Spatial primitives are used to represent the objects in vector datasets c) If two regions do not share any part of their boundaries, the topological relation between them must be "disjoint" in the 4-intersection matrix model d) Topological relations between any 2D pairs of objects can be adequately represented by the 4-intersection matrix model e) Objects are represented by means of the cells of the grid they intersect in raster datasets f) None of the answers provided Q5) Which of the following statements are correct? a) The query "In what county is the town of Dalkey?" is an example of point query (also called point location) b) Theme selection is an example of spatial query c) Conversion from one vector format to another vector format (i.e. vector-to-vector) does not involve alteration of the original data structure d) The empty circle property is the only way in which we can verify if a triangulation is a Delaunay triangulation e) In a plane subdivision represented using the symmetric data structure, relation VV can be reconstructed by combining relations VE and EV which are explicitly stored in such a data structure. f) None of the answers provided