An erior is encounteded while exacuting the following code.

Private List $$ Integer $>$ convertioIntList $($List & string $>$ Hist$)($

List $c$ Integer $>$ intist $-$ new Arraytist :

for istrinest $1+$se$)?$

intlist.add$(n)$:

$7$

Trtuin mittist:

$\sqrt[\phantom{2}]{2}$

privite int sum$($tist $$ Integer $>$ Ifst$)($

int sua $=9$ ;

$1$

itstr.set$(1,$ tist,get$(9)+2)$;

for $($int ti o; icistisize$()$: it$+)$ I

$1$

elin $+=11$ st$-$get $\{t\}$;

return sun;

$9$

Which of the following piece$($s$)$ of code when added will result in erecution without error?

Paci ONE OR MORE options

int sum $=$ Arrays.stream$($n$)$ mapToint$($i si$)$ map $2)$ reduce