Which navigation tool is used to annotate a slide during a presentation?

Which data set(s) will produce frequent itemsets containing items with wide-varying support levels (i.e., items with mixed support, ranging from less than 20% to more than 70%).

Answer the following questions using the data sets shown in Figure 6.6. Note that each data set contains 1000 items and 10,000 transactions. Dark cells indicate the presence of items and white cells indicate the absence of items. We will apply the Apriori algorithm to extract frequent itemsets with minsup = 10% (i.e., itemsets must be contained in at least 1000 transac- tions)?

MC File-open mode__________ opens a file to output data to the file.

a) "r". b) "w". c) "a". d) Both b and c.