Planet nearest to sun is

Name the planet nearest to the sun.

A planet is revolving about sun in an elliptical orbit. Choose the correct option based on the statements given below, (i) Areal velocity is constant. (ii) Arval velocity is proportional to velocity (iii) When planet is nearest to sun it's speed is maximum, (iv) Planet will move with constant speed. (v) Areal velocity is inversely proportional to velocity.

The period of revolution of a planet around the sun is 8 times that of the earth. If the mean distance of that planet from the sun is r, then mean distance of earth from the sun is