In the diagram below, start overline, N, O, end overline NO is parallel to start overline, K, L, end overline KL . If start overline, K, L, end overline KL is twice the length of start overline, N, M, end overline NM , K, M, equals, 14KM=14, and N, O, equals, 7NO=7, find the length of start overline, N, M, end overline NM . Figures are not necessarily drawn to scale. State your answer in simplest radical form, if necessary.