Consider the following. y1 = 1 − x2, y2 = x2 − 1 (a) find all points of intersection of the graphs of the two equations. point a (x, y) = ( ) (smaller x-value) point b (x, y) = ( ) (larger x-value) (b) find the unit tangent vectors to each curve at their points of intersection. point a y1 = ± (−1,2) √5 point a y2 = ± (1,2) √5 point b y1 = ± (1,2) 5 point b y2 = ± (1,−2) 5 (c) find the angles (0° ≤ θ ≤ 90°) between the curves at their points of intersection. (round your answers to two decimal places.) point a ° point b °