1. The problem statement, all variables and given/known data 2. Relevant equations included in the first picture 3. The attempt at a solution i feel confident in my answer to part "a". i pretty much just did what the u and v example at the top of the page did. but for part "b" i tried to distribute and collect like terms and what not and i ended up with a huge mess. so i can anyone tell me if im on the right track. and that the end product should like look a huge mess of terms. thanks!