what is the c (nf/km) when the l (mh/km) is 0.6099?
CREATE TABLE "characteristics_of_telephone_cable_as_a_" (
  "frequency_hz" text,
  "r_km" text,
  "l_m_h_km" text,
  "g_s_km" text,
  "c_n_f_km" text
);
SELECT "c_n_f_km" FROM "characteristics_of_telephone_cable_as_a_" WHERE "l_m_h_km"='0.6099';