6. (5 points each) There is a 95% chance of passing any exam. What is variance in number of attempts until third exam is passed? 7. (1 point each) For each situation, would you nd an Euler circuit or a Hamilton Circuit? a. The department of Public Works must inspect all streets in the city to remove dangerous debris. b. Relief food supplies must be delivered to eight emergency shelters located at different sites in a large city. 0. The Department of Public Works must inspect traic lights at intersections in the city to determine which are still working. d. An insurance claims adjuster must visit 11 homes in various neighborhoods to write reports