Suppose you are stargazing at a latitude of 30.0∘ on Earth. For each of the following stars, determine if it is (a) visible all year round, (b) visible sometimes during the year, or (c) never visible. For each, explain your reasoning. ( star i, at a declination of 70∘ ) : (star ii, at a declination of 30∘): (star iii, at a declination of −30∘) : (star iv, at a declination of −80∘): Will the pole star that we see in the northern hemisphere always remain the same? If not, why not? Explain.