What is the reflection rule that maps the triangle to its image ? P(8,4), (-6,5),R(4,5) and P^ prime (8,12),q^ prime (-6,-13), R^ prime (4,-13)

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.