Table 1615 Suppose that two coal mining companies - Allied aad Barelay - own adjaceet lend ruitable for exeavating coal miocs. The profits that each firm earnir depends on both the number of minesit excavates and the number of mises excovaled by the ofher firm. The table below lints cach firm' individaal profite: Alilied Excrsate doe mine Exearate two minei Refer to Table 18-15. Is there a Ninb equalatriua? If so, devcrite if.