Three consecutive energy groups in an ultrane cross section library have absorption cross sections..

Three orderly essence groups in an ultrane peevish exception library keep parching peevish exceptions of 5, 6, and 7 barns. If the essence groups keep the similar width, and they are defenseless to a neutron ux of 1.0 × 108 neutrons/cm2/s, 2.0 × 108 neutrons/ cm2/s, and 3.0 × 108 neutrons/cm2/s, respectively, what is the parching peevish exception for the furled essence group?