Need help with Perl, using perl 5

Exercise A7

The following statements set the values:

$x = 3;

$y = 0;

$z = -4;

Then, which of the following expressions evaluate to true, and which evaluate to false?

!( $x < $y ) = True

!( $x >= $y ) False

!( (4 + 5 * $y) >= $z -2 ) && ( $z - 2 )

!($x) && !($y) || !($z)

Exercise A8

Code a single statement, which uses the && operator, and produces the same results as this code:

if ( $x < 10 )

{

$x++;

}

Exercise A9

Code a single statement, which uses the || operator, and produces the same results as this code:

unless ( $x < 10 )

{

$x++;

}