What is the largest $n$ for which one can solve within a day using an algorithm that requires $f(n)$ bit operations with the given function $f(n)?$

Ch $03$ Sec $3$ Ex $16($f$)-$ Time Complexity Calculations

$f(n)=2^n$ and each bit operation is carried out in ${10}^{-12}$ seconds

Multiple Choice

$51$

$59$

$56$

$53$