A star is 5.5 light years away from the Earth. How much parallax in arcsec will it subtend when viewed from two opposite points

A star is 5.5 light years away from the Earth. How much parallax in arcsec will it subtend when viewed from two opposite points
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A star is 5.5 light years away from the Earth. How much parallax in arcsec will it subtend ... from two opposite points along the orbit of the Earth?
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