What is the lateral area of this regular octagonal pyramid?

114.8 cm²

162.4 cm²

229.7 cm²

What is the lateral length of this regular octagonal pyramid?
The figure shows a regular octagonal pyramid. A dashed line segment is shown perpendicular to a base edge with its second endpoint being the center of the base and has a length of 7 centimeters. A second dashed line segment has one endpoint at the center of the base and the second endpoint at the vertex of the pyramid and has a length of 7 centimeters. A base edge has a length of 5.8 centimeters.