Nested And/IF Statments

Hello and good day.

I am in the process of putting together an annual bonus/vacation accural sheet and need some assistance with building a complex function. Here is what is needing to occur.

In cell A1 is the number of years that a mariner has been employed
In cell A2, I need it to reference cell A1 and return a value of either 10 days, 15 days or 22 days based upon the below information.

1-4 years = 10
5-9 years = 15
10+ years = 22

Can this be done? I am attempting to do this with in 2013 and when I go to piece meal all the data, my system screams error.

Help???