defined the problem in my own words
added insight to the problem
added overall goal
added subcategories for goal
added constraints to sub goals
added possible solutions to subgoals
added evaluation of solutions
added explanation for solution
changed solution and explanation
added example to case
added my own definition for problem #2
added overall goal to problem #2
added sub goals for problem #2
added constraints to problem #2
added possible solutions to problem #2
added evaluation of solutions to problem #2
added explanation of solution to problem #2
added cases/examples for solution.
added problem in my words to problem #3
added sub goals to problem #3