How old is the sun and since it's birth, how has the sun changed?

Taking the age of the earth to be about 4 * 10^9 years and assuming the radius of its orbit has not changed and is circular, calculate the approximate total distance the earth has traveled since its birth (in a frame of reference stationary with respect to the sun)

Ithink it is space that makes up 70 percent

Answerstratovolcanoes///near or in the ring of fire;