28. let c denote the boundary of the semi-circular disk (d) 1 30. fo d{%, y)er: x+y<1,y<0} and let ox,y) = y for (x, y) ed. if n is the outward unit normal to c

28. Let C denote the boundary of the semi-circular disk (d) 1 30. Fo D{%, y)ER: x+y<1,y<0} and let ox,y) = y for (x, y) ED. If n is the outward unit normal to C, then the integral (Vo) hds, evaluated countet C clockwise over C, is equal to (6) T-2 (a) 0 (c) T (d)T +2