valuate the line integral along the curve C 1) Ile 2yn ,lds, C is the curve r(f)-(9sin 4(9 cosãå+12tk, 2 sts4 1521 A) 819 B) o. D) 64 64 Evaluate the line integral of fix,y) along the curve C. 2)f(x, y) = cos x + sin y, C:y=x,0sxs_ B) 0 A) 2 Find the mass of the wire that lies along the curve r and has density δ. 3) r(t) = 81 + (10-3t)) + 4tk, 0 s t s 2Ï ; δ-5(1 + sin 4t) D) 25 + 50Ï units 25 B) + 50Ï units C) 10Ï units A) 50Ï units