(Solved): For the given points \( P, Q \), and \( R \), find the approximate measurements of the angles of \( ...

For the given points \( P, Q \), and \( R \), find the approximate measurements of the angles of \( \triangle P Q R \). \[ P(0,-1,4), Q(3,3,1), R(-2,2,6) \] The measure of \( \angle \mathrm{P} \) is (Round to the nearest tenth as needed.) The measure of \( \angle Q \) is (Round to the nearest tenth as needed.) The measure of \( \angle \mathrm{R} \) is (Round to the nearest tenth as needed.)