Could you help me with question number 12 please?

For Exercises 37 and 38, let P - (2, 5, 7), Q = (-2, 1, -5), and R = (-3, 0, 4). 37. Find the distance between the point P and the line deter- mined by the points Q and R. 38. Find the altitude of triangle APQR from vertex R to side PQ 39. Find the angle between the diagonal of a face of a cube and the adjoining edge of the cube that is not an edge of that face. 40. Find the angle between the diagonal of a cube and an adjoining edge of the cube.adjoining diagonal of one of the faces of the cube. 42. Find the angle between two distinct diagonals of a cube