(1 point) Consider the parametric curve given by x = t - 12t, y = 5+2 - 5 (a) Find dy/dx and day/dx2 in terms of t. dyldx = d2 yldx2 = (b) Using "less than" and "greater than" notation, list the t-interval where the curve is concave upward. Use upper-case "INF" for positive infinity and upper-case "NINE" for negative infinity. If the curve is never concave upward, type an upper-case "N" in the answer field. t-interval: