What remains on the chair is the original stain or/and pigment from the paint. I doubt that any paint stripper will remove the stain. You could try a two-part wood bleach or oxalic acid. Please pay attenttion to safety labels/instructions. Qxalic acid is an organic. solution and the biggest concern is eye protection.
The steps taken by Incas to unite the empire in the given options are: 1) They built a vast network of roads, bridges, and tunnels. 2) They imposed their language and religion on conquered peoples. These factors helped them empire unification. Incas are known to have risen as the strongest Andean Civilization.
One of the reasons that the Incas were such a successful empire was that they had a very organized government system. Pachacuti was the emperor who recognized that in order to become a great empire they needed a stable government. He converted to a new government system known as Tahuantinsuyu which consisted of a federal system and four provincial governments. The head of the federal system was the Sapa Inca who was believed to be a descendant of the sun god. He was greatly respected by everybody in the empire. The empire was divided into four regions which were controlled by men called Opas. Below the Opas were Inca noblemen who controlled the provincial governments.