so for the 2nd question: an herbivore that eats only narrow leaves (organism with bb genotypes) will decrease f(b) and increase f(B)
And for the 1st question:
you have to calculate the allele frequencies for each generation and u can do that by writing 2 equations. After u find the values of f(b) and f(B) for each generation by comparing the values you can tell wether or not this population is in equilibrium. If the values have stayed fairly the same that means it’s in equilibrium and it is not evolving. I think this population is not in equilibrium and thus is evolving by looking at the numbers in the table.
If you still have questions or problems with the calculations leave a comment and I’ll help. :))
