2. a-3 RST has coordinates R(-4, -3), S(0, 5), and T(7, -3). a. Graph a-3 RST in a coordinate plane. b. Find the perimeter of a-3 RST. c. Find the area of a-3 RST. d. The centroid of a triangle is the intersection of its medians. Use the following steps to find the centroid of a-3 RST using segment partition. i. Find the midpoint of JR. Label it N. ii. Find the point, C, that partitions SN such that SC:CN has a ratio of 2:1 . iii. Plot point C in your graph of a-3 RST. e. Find and graph the midpoints of / R, RS , and S/ . Draw a segment connecting the vertex opposite each midpoint to the midpoint