Indicate whether each statement below is true or false about database normalization.

it decomposes data into multiple tables in order to remove non$-$key redundant data

a table contains data about a single entity and columns in the table describe characteristics of that entity

it helps to recover data in the event of a computer failure

it helps to make data access fast

it helps to prevent database update anomalies due to duplicated data

it prevents the problem of lost updates when there are concurrent users

it protects data against unauthorized access