Samin, Sharar and Nafi are three good friends. Samin lives in a city near the equator with longitude $25^oE$. Sharar also lives in a different city close to the equator. Nafi lives in a different location which has a latitude of $27.3^oN$. Samin was on a group call with his two friends at $4$ $AM$. He looked at the sky and saw that a bright star is on the zenith (right above his head). As he told his friends about it, Sharar and Nafi both realized that both of them can see the same star on the horizon (altitude = $0^o$) from their respective locations.

What is the declination, $\delta$ of that star