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COMP 4045 - Computational Geometry Assignment 3 1. Prove that for any n > 3 there is a set of n sites in the plane such that one of the Voronoi region has n-1 vertices. (Exercises 7.1). 2. Let P be a set of n points in the plane. Give an O(nlogn) time algorithm to find two points in P that are closest together. (Exercises 7.10). a) Design an algorithm; b) Prove its correctness; c) Show its time complexity. 3. The idea of Voronoi Diagram can be further extended. For instance, k nearest points is required in some cases instead of the nearest one. This problem is known as “order-k Voronoi Diagram”. (please make clear acknowledgement of any previous work) a) Design an algorithm; b) Prove its correctness; c) Show its time and storage complexity.