Access types in solidity

There are four types of access in solidity:

1. public - can be used when contract was deployed, can be used in inherited contract
2. external - can be used when contract was deployed , can NOT be used in inherited contract
3. internal - can NOT be used when contract was deployed , can be used in inherited contract
4. private - can NOT be used when contract was deployed, can NOT be used in inherited contract

pragma solidity ^0.8;
 
contract Parent {
    bool internal internalProperty;
    bool private privateProperty;
}
 
contract Child is Parent {
    function foo() external {
        // ok
        internalProperty = true;
 
        // error, not visible
        privateProperty = true;
    }
}