At some distance away, at an elevation of 15,072 feet above sea level, Thomas Montgomerie recorded an angle of elevation to the top of the 2nd peak he observed in the Karakoram range (K2) to be 1.144º. From the same elevation but 5 miles closer, he records the angle of elevation to the summit of K2 to be 1.1910. (a) Based on his calculations, how high above sea level (in feet) is the summit of K2?