f:$\{0,1\}4->\{0,1\}4$f$($x$)$

is obtained from x

by flipping the first bit of x

$.$

Flipping a bit means that if the bit is $0$

$,$ then the bit is replaced by $1$

and if the bit is $1$

$,$ then the bit is replaced by $0$

$.$

For example, f$(1110)=0110$

$.$

Select the correct description of the function f

$.$

Group of answer choices

One$-$to$-$one but not onto

Neither one$-$to$-$one nor onto

Onto but not one$-$to$-$one

One$-$to$-$one and onto