(1 point) Find the line integral with respect to arc length f (4:1: + 6y)ds: where C is the line segment in the my-plane with endpoints P : (8, 0) and C Q : (0,4)- (a) Find a vector parametric equation t) for the line segment 0 so that points P and Q correspond tot = 0 and t = 1' respectively. Ht) : (b) Using the parametrization in part (a): the line integral with respect to arc length is I'D 1(42: + 6y)d3 : / alt C a with limits of integration a : and b : ((2) Evaluate the line integral with respect to arc length in part (by 1001; + 6mg =