J$.$ Explain why the attribute usage values are not enough to perform the attribute splitting for vertical fragmentation? $(1$ Point$)$

Answer:

K$.$ Calculate the attribute affinity measures using the following access information from three sites and assuming each query accesses the attributes twice during each execution. $(6$ Points$)$

$\backslash$table$[[acc1(q1)=4,$acc$2(q1)=10,$acc$3(q1)=5$