Find the line integral of f(x, y,z) = x + y + z over the straight-line segment from (5,2,1) to (4, - 2, - 2). c (x+ y+ z) ds = (Type an exact answer, using radicals as needed.)3 Find the mass {if a wire that lies along the curve nit} = [t2 1] j + Etk. U 5 ts 2. if the density is E = it c:} ! {x:1,r.zjlds = D {3 [Type an exact answer: using radicals as needed} Find the mass of a thin wire lying along the curve r(t) = $5ti+ 2tj+ (1-t" ) k, Ost=1, if the density is (a) 6 = 3t and (b) 6 = 1. (a) The mass of a thin wire with density 6 = 3t is units. (Type an exact answer.)