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Answer:
81°
Step-by-step explanation:
m(arc)JKL = 2m<E = 2(99°) = 198°
m(arc)JEL = 360° - m(arc)JKL
m(arc)JEL = 360° - 198° = 162°
m<K = (1/2)m(arc)JEL = 162°/2 = 81°