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Triangle L M N is shown. Angle M L N is a right angle. The length of M L is 5.74, the length of L N is 4, and the length of hypotenuse M N is 7.
Law of cosines: a2 = b2 + c2 – 2bccos(A)

What is the measure of AngleN to the nearest whole degree?

35°
45°
55°
65°