1. The problem statement, all variables and given/known data Attached 2. Relevant equations 3. The attempt at a solution I'm not quite sure how to start these. Once I figure out one of them, I should be able to do the rest. The confusing piece to me is with the unit directional vector (a_rho etc. My teacher has me horribly confused as to what I'm supposed to do with those terms. My initial idea is to use the matrix method for solving it. But I'm not sure. Any help would be greatly appreciated!