1. (2 marks) Simplify the fraction x2 - y2 - 22 +2yz 2x2 - y2 + 2xz+ yz- xy 5. (5 marks) To succeed at catching a smeep in a video game, players need to use smeep treats. Another player gives you the following table of number of treats used versus the chance of successfully catching the smeep: Number of Treats 1 2 3 5 10 Success Chance 10% 55% 70% 82% 91% (a) Is the success chance proportional to the number of treats used? Explain your answer. [b) The chance of failure is 100%- the chance of success. Find a proportionality relationship between the number of treats and the chance of failure, justifying your answer. (c) Find a formula for the success chance S in terms of the number of treats N. (d) How many treats would you need to use to have a success chance of 95%