Answers to 11.2.1

A) The green curve has the same energy gap but different masses relative to the red one

B) The product of the green masses is 1/81 that of the red. (Each mass was reduced by 1/9, but all of the change could have been in one of the masses, or ... .)

C) For the blue curve, the energy gap has been increased by a factor of 5/4 = 1.25 relative to the red.