On a coordinate plane, a curve goes through (negative 1, 0), (0, negative 60), (2.5, negative 60), and (4, 0).
The real solutions of the equation x4 – 7x3 + 23x2 – 29x – 60 = 0 are shown. What are the nonreal solutions to the equation?

2 + i StartRoot 11 EndRoot, 2 minus i StartRoot 11 EndRoot.
Negative 2 + i StartRoot 11 EndRoot, Negative 2 minus i StartRoot 11 EndRoot.
4 + 2 i StartRoot 11 EndRoot, 4 minus 2 i StartRoot 11 EndRoot.
Negative 4 + 2 i StartRoot 11 EndRoot, Negative 4 minus 2 i StartRoot 11 EndRoot.