$1$ public double a$($double k$[])$

$2\{$

$3$ double result $=1\mathrm{.}0$;

$4$ for $($int i $=0$; i $$ k$.$length$/2$; i$++)$

$5$ result $=$ result $*$ p$($i$)*$ b$($k$)$;

$6$ return result;

$7\}$

$8$

$9$ public double b$($double j$[])$

$10\{$

$11$ double result $=0\mathrm{.}0$;

$12$ for $($int i $=0$; i j$.$length; i$++)$

$13$ result $=$ result $+$ j$[$i$]/$p$($i$)$;

$14$ return result;

$15\}$

Suppose that method $p$ has a return type of double

and requires $O(r)$ time, where $r$ is independent of

$i.$ If we let $n=j.$ length, what is the time

complexity of method $b$ in the worst case? $($If more

than one answer is applicable, choose the tightest

upper bound$)$