Question 1198026
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The Earth’s orbit is an ellipse with the sun as one of the foci. 
If the semi-major axis of the Earth’s orbit is 92. 9 miles, find
a. the distance of the sun from the center 
b. the shortest and longest distances of the earth from the sun
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As worded, printed, posted and presented,  this  " problem "  is  FATALLY  DEFECTIVE.


It does not provide enough data to answer the posed questions.


Some data is missed in the post.




Plus an additional notice.


        In reality, the semi-major axis of the Earth’s orbit is  92.9  {{{highlight(highlight(millions))}}}  miles.


Learn from this Wikipedia article 

https://en.wikipedia.org/wiki/Earth%27s_orbit