How to fill in a life table for ecology?

''Start with 100 salamanders, 50 with rapid trait and 50 with slow trait. Each year, you will count the numbe of salamanders that emerge from the pond allow those salamanders to reproduce. Each rapid salamander will produce 5 offspring per year, each slow salamander will produce 15 offspring per year. Adults die after 2 years, after breeding twice. You'll start each year by adding new larvaefrom the reproductive event into th pond. This simulation is a pond that dries every year - all salamanders with the slow trait will be removed from the population.''

How do I fill out this chart?! I understand the principles, just not the math bits.
Thank you in advance.