Which definite integral approximation formula is the integral from a to b of f of x, dx is approximately equal to the product of the quantity b minus a over 2 times n and the quantity y sub 0 plus 2 times y sub 1 plus 2 times y sub 2 plus 2 times y sub 3 plus dot dot dot plus 2 times y sub n minus 1 plus y sub n ? (4 points) Circumscribed rectangles Inscribed rectangles Mid-point rule Trapezoidal rule