How does the given function improve the code versus if no function was present?def fahrenheit$\_$to$\_$celsius $($fahrenheit$)$:return $($fahrenheit $-32\mathrm{.}0)*5\mathrm{.}0/9\mathrm{.}0$fahrenheit $=$ float $($input $())$c$1-$fahrenheit$\_$to$\_$celsius $($fahrenheit$)$;c$2=$ fahrenheit$\_$to$\_$celsius $(32\mathrm{.}0)$;c$3=$ fahrenheit$\_$to$\_$celsius $(72\mathrm{.}0)$;$$ The function does not improve the code The use of the function makes the program run fasterO The use of the function decreases redundant code The use of the function reduces the number of variables in the code