Three strings are tied together. They lie on top of a circular table, and the knot is exactly in the center of the table, as shown in the figure (top view). Each string hangs over the edge of the table, with a weight supported from it. The masses m1 = 4.30 kg and m2 = 5.40 kg are known. The angle α = 74° between strings 1 and 2 is also known. What is the angle β between strings 1 and 3?

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