pls help solve this problem

2. [15 marks; (a) 5 marks, (b) 10 marks] (a) Evaluate the triple integral ff] m dydz, D where D is the tetrahedron enclosed by three coordinate planes and the plane a: + 319' + 22 = 6. (b) Let F be the curve consisting of the line segment from (0, 2) to (0, 2) and the semi-circle from (0) 2} to (0, 2) in the right half plane a: > 0, with counterclock- wise orientation. Evaluate )5 F - dr with F(m,y) = my3i + 42:\"ij I' by (i) using Green's Theorem; (ii) direct evaluation