Allen Chu is a firstyear medical student. He is interested in finding out which symptoms of medical conditions tend to appear together in his research. He compiles a data set for 36 patients where the first entry lists the medical condition and the remaining entries are common symptoms associated with the medical condition. A portion of the data is shown in the accompanying table. 

Make sure to read the data file into R using the readtransactions function first. 

a. Generate association rules with a minimum support of 0.1 and minimum confidence of 0.5. Sort the rules by lift ratio. Report and interpret the lift ratio of the top three association rules.

b. Display a scatterplot comparing the rules obtained in part a. How many rules have at least 0.75 confidence, 0.15 support, and 1.2 lift ratio?

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Patient 1 Patient 2 Acute Sinusitis, Fever... Decreased smell Alcohol Intoxication, Abnormal gait (walking)... Stool leaking (incontinence) E Patient 36 West Nile Virus, Chills... Confusion, Fever