Evaluate S: F. dr where C is represented być (t) . с a). F(x,y) = 3xi + 4yj; C: r(t) =cos (t)i + sen(t)j, osts#/2 ; bl.„F (x, y, z) =xyi+xzj+ yzk ; C: r(t) = ti+t2j+ 2tk, 0