A recursive function is defined by f(n)=n⋅f(n−1)f(n) = n \cdot f(n-1)f(n)=n⋅f(n−1) for n≥1n \ge 1n≥1, with f(1)=1f(1) = 1f(1)=1. What is the value of f(4)f(4)f(4)?
24
12
6
1