How many 8's are there in the following number sequence which is immediately preceded by 4 and not followed by 7? <br> 7 8 4 7 4 8 8 3 5 1 4 8 7 2 1 4 8 5

Question

$\begin{array}{11} (a)\;3 \\ (b)\;2 \\ (c)\;4 \\ (d)\; 5 \end{array}$