implement below function in java

and calculate A(2,2) and A(2,1)

1. Implement below function and calculate A(2,2) and A(2,1). Ackermann's function A(m, n) is defined as follows: A(m,n) = n+ 1 Alm 1, 1) Alm 1, Am, n n 1)) if m=0 if n2 = 0 otherwise C T 1