Chris, Maria and David are customers of your on-line DVD e-commerce business, and they have provided ratings for the films Star Wars and Frozen 2 as follows (assume no rating is 0 stars): Chris rated Star Wars with 2 stars and Frozen 2 with 4 stars. Maria rated Star Wars with 3 stars, and did not rate Frozen 2. David did not rate Star Wars, and rated Frozen 2 with 2 stars. a) Find how similar Chris and Maria are, based on their ratings for the two films. b) Find how similar Maria and David are, based on their ratings for the two films. c) Represent the problem graphically in a two dimensional space