The gel below represents the restriction analysis of a 10 kb linear dna. in addition to the size marker lane (m, size of fragments indicated), the lanes show an uncut dna sample (uc), a sample digested with ecori (e), a sample digested with bamhi (b), and a sample digested with both enzymes (e+b). based on the pattern of bands in the gel, which of the restriction maps at right most accurately describes this dna?