Complete the three function stubs. Do NOT use Pythons max() and min() functions. The max_min_diff() function must call the other two functions. Save & Run Original - 1 of 1 Show Feedback Hide Code Show CodeLens 1 # return the maximum of a,b,c 2 def max_num(a, b, c): 3 # your code here 4 return 0 5 6 # return the minimum of a,b,c 7 def min_num(a, b, c): 8 # your code here 9 return 0 10 11 # return the max number minus the min number 12 def max_min_diff(a, b, c): 13 # your code here 14 return 0 15 Activity: 1 ActiveCode (max min diff pdc)