Which of the following is/are correct way(s) to increment variable p?  Tick all correct answer(s).  No partial marks and no negative marks.Select one or more:p++p=p+1p+++p

Which of the following is not a valid way to increment a variable in PHP?$var++;++$var;$var += 1;$var =+ 1

Which of the following statements should NOT be used to increase the value of c by 1?Select one:c++;c = c + 1;c += 1c + 1 => c;

Which of the following are valid ways to update a variable?Choose as many answers as you see fit.total++total - 1total--total = total + 1

How would you add 1 to the variable $count?Select one:a.  incr count;           b.  $count =+1                       c. $count++;  d.  incr $count;

Which of the following statement(s) is/are NOT correct?  Tick all correct answer(s).  No partial marks and no negative marks.Select one or more:A variable must be declared before using itNested-if statements cannot check fractional values.Switch statement can only check the fractional values