python

For the following recursive function: def mystery (1st): return mystery_aux (1st,0) def mystery_aux (1st, p): if p >= len (1st): return 0 1st[p] += mystery_aux (1st, p + 1) return lst[p] (a) Explain what the function does. i B I U X2 x2 = = = E E ABC 123 (b) Give an example of input, output and list content after calling the function