An article in the The Canadian Entomologist (Harcourt et al, 1977, Vol. 109, pp. 1521 - 1534) reported on the life of the alfalfa weevil from eggs to adulthood. The following table shows the number of larvae that survived at each stage of development from eggs to adults.

a) What is the probability an egg survives to adulthood?
b) What is the probability of survival to adulthood given survival to the late larvae stage?
c) What stage has the lowest probability of survival to the next stage?

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Late Pre- Adults Late Early Larvae Larvae pupae Pupae 45 Eggs 35 31 306 412 421