Looking for help in setting up Visual Tree to help me understand and Bayes Theorem equation maybe ?

The probability that a person with certain symptoms has COVD-19 is 0.86. One test being used to confirm this diagnosis gives positive results for 95% of people with the virus and 6% of those without the virus. What is the probability that an individual has these symptoms and tests positively actually has COVlD-19? C] Enter a decimal and round to four decimal places as needed