At how many points do the curves ri (t) = (t', -3t, 1) and re (#) = (t + 2, t' + 2, ") intersect? 0 0 01 02 0 3 Question 2 1 pts Estimate x sin y dy de using the midpoint rule with m = 1 and n = 3 (by dividing the region into three equal subregions with horizontal line segments). O 16TT