Referring to Problem 10.2, if n₁ = 5 and n₂ = 4, how many degrees of freedom do you have?

Data From Problem 10.2:

Assume that you have a sample of n₁ = 8, with the sample mean X̅₁ = 42, and a sample standard deviation S₁ = 4, and you have an independent sample of n₂ = 15 from another population with a sample mean of X̅₂ = 34 and a sample standard deviation S₂ = 5.