Anyone Help? Insight Student Specifically. Its computer fundamentals. No Number 7?

1=c, 2=c, 3=a, 4=c, 5=a, 6=d, "there is no # 7", 8=b, 9=c, 10=b, 11=b, 12=d,- (but a more realistic cause of file corruption is the degree of fragmentation on the hard drive.), 13=a, 14=a, 15=b, 16=a, 17=c, 18=d, 19=a, 20=b.