If anyone can show me how this one is done step by step please. thank you :)

The following four questions concern the four points P = (1,4,3), Q = (2,1,3), R = (3,4,1) and S = (1,0,4). > > . Find a vector perpendicular to both PQ and PR. . Find an equation of the plane that contains P, Q and R. . Find the minimum distance between the plane found in question (2) and the point 3. Leave your answer in exact form (i.e., something like V 72/7r). Do not use a decimal approximation. . Using the results of questions (1) and (3) compute the volume of the tetrahedron dened by the four points P, Q, R and 5'. You may use the result that the volume of a tetrahedron can be computed as onethird the height times the base area. If you choose to use some other approach in calculating the volume then you will be expected to provide some justication (such as a reference to a textbook or a web page or even better, a complete mathematical proof). Leave your answer in exact form