Identify the correct steps involved in the algorithm that finds$$ a$2$na$2$n for a real number a and a positive integer n$.($Check all that apply.$)$

$$

Check All That Apply

procedure twopower$($n: positive integer, a: real number$)$procedure twopower$($n: positive integer, a: real number$)$

if n $=1$ then return a$2$if n $=1$ then return a$2$

if n $=1$ then return aif n $=1$ then return a

else return twopower$($n $1,$ a$)2$else return twopower$($n $1,$ a$)2$

else return twopower$($n$,$ a$)2$