Write the best tle lines for the funcons $($funcon signatures$)$ that are called by the following main program. Do

not supply the blocks for the funcons.

int main$()\{$

int qq;

double rr$[3]=\{0,1\mathrm{.}1,2\mathrm{.}2\}$;

string st$[3]=\{"1\mathrm{.}9","2\mathrm{.}3","3\mathrm{.}0"\}$;

qq $=$ f$1($rr$[2]+$ rr$[1],$ rr$[2])$; st$[0]=$ f$2($rr$[0]+$ rr$[1],$ rr$[0],$ rr$[0],$ st$[2])$; $//($b$)$

if $($f$3($st$,$ st$,3))$ cout $<<2$; f$4($st$[1],$ qq$)$; $//($d$)$

char k $=$ f$4($f$5($rr$[1],$ st$),$ rr$[1])$; $//($a$)$

$//($c$)$

$//($e$)$

$\}$