3. Analyse the algorithm, fill in the blanks to complete the code and answer the question.M and n are both natural numbers. If m is given,we can add up some natural numbers that are lessthanor equal to n to get m. For example, if n=3 and m=5, we can split m into 1+1+3 or 2+1+2,......The function f(m,n) returns the number of ways m could be denoted. On the previous example, f(5,3)=5as 3+23+1+12+2+12+1+1+11+1+1+1+1.(5pts, 1pt per blank) (1)Please fill in the blanks to complete the code for f(m,n). def f(m,n) sum=self.m sum=self.n if(sum==1): return (1) elseif(num==1): return (2) elseif(sum