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Given below are two pairs of statements. Combine these two statements using if and only if: `p :` if the sum of the digits of a number is divisible by 3, then the number is divisible by 3. `q :` if a number is divisible by 3, then the sum of its divisible by 3.

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A number is divisible by 3 if and only if the sum of the digits is divisible by 3.
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Given below are some pairs of statements. Combine each pair using if and only if: (i) p: If a quadrilateral-is equiangular, then it is a rectangle. q: If a quadrilateral is a rectangle, then it is equiangular. (ii) p: If the sum of the digits of a number is divisible by 3, then the number is divisible by 3. q: If a number is divisble by 3, then the sum of its digits is divisible by 3. (iii) p: A quadrilateral is a parallelogram if its diagonals bisect each other. q: If the diagonals of a quadrilateral bisect each other, then it is a parallelogram. (iv) p: If f(a) = 0, then (x -a) is a factor of polynomial f(x). q: If (x-a) is a factor of polynomial f(x), thenf(a) = 0. (v) p: If a square matrix A is invertible, then |A| is nonzero. q: If A is a square matrix such that |A| is nonzero, then A is invertible.

Assertion: The number 9020814' is divisible by 11. Reason: A number is divisible by 11, if the sum of its digits is divisible by 11.

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