That’s a formula triple G. The question was to explain it. How it happens. Where it happens. The intermediates, the steric hindrance forces that push conformational changes, catalysts, the required energy input to drive the reaction. You know - the details. Anyone can google up a formula.
She said a freshman biology student can do it. Some of them I suppose - most I taught took it to fill a science requirement.
Why doesn't someone show their work on the details of how a fin turns into a leg. What specific mutations happened? How many? In what sequence? And why did each mutation generate such a survivability advantage that the poor creatures without the mutation went extinct while the mutated creatures survived? What was the specific environmental pressure accompanying each mutation that caused each of these mutations to have such as large advantage? Just how do mutations increase the information to change a fin into a leg? Just the formula: Fin + mutation + natural selection + billions of years = leg, explains nothing.