1. The problem statement, all variables and given/known data Attached as Question.jpg. 2. Relevant equations Partial differentiation. Lagrange multiplier equation. 3. The attempt at a solution Attached as MyWork.jpg. Is my work correct? I'm still not confident with myself for these problems and it would be great if someone could confirm if I did this problem correctly and also, the values (or value since I can ignore the negative because it makes no sense in the problem) I get seem rather strange and, knowing my teacher, he usually gives problems with numbers that work out well and his notes also have nicely fitting numbers.