In the given series below, count the number of 7s which are immediately preceded by an even number and immediately followed by either 1 or 3. How many such 7s are there?

6 9 7 0 2 6 4 5 2 7 2 7 3 8 2 7 3 3 6 7 8 9 2 8 7 1 0 3 5 4 5 2 7 3