If elseif else echo statement with radio buttons

Question

Hi everyone  Please help me out here.  I have a standard php file with 4 groups of questions (radio groups). The user must answer "yes" to ALL 4 questions where after "You Qualify" will echo on the same page.  If any of the questions are answered "No" to, then "you do not qualify" must echo on the same page. If no answer is selected - then no echo  This sounds like a simple if elseif else  statement, but for some reason I just cant get it right.  Could anyone please help me out with this?  Herewith code that I have tried:
Do you like apples?        Yes           No 
Do you like oranges?
        Yes           No 
Do you like pears?
     Yes      No
Do you like lemons?
     Yes      No

Answer 1

<?php
if ($a > $b) {
    echo "a is bigger than b";
} elseif ($a == $b) {
    echo "a is equal to b";
} else {
    echo "a is smaller than b";
?>