$1-$bit error correcting code

$1.$ What does a $1-$bit error correcting Hamming code do$?$

$2.$ Given the $4-$bit message $1011$ what is the $1-$bit error correcting Hamming code.

$3.$ What $4-$bit value is stored in memory when $1110101$ utilizing a $1-$bit error correcting Hamming code is received by the memory unit.