(1) In how many ways can 20 essential amino acids be arranged into a hexapeptide?

(2) In a pet store, 34 of their rabbits for sale are brown type, 17 are chinchilla, 25 are Himalayan, and 8 are albino.

a. Assuming that each of the rabbits has an equal opportunity of being drawn from the pen, what is the probability that a chinchilla will be drawn?

b. Using the same data on rabbits, what is the probability that a Himalayan or an albino is drawn?

c. Consider that there is an equal distribution of sexes among the rabbit varieties. What is the probability that a brown female rabbit is drawn from the pen?