Calculate the negative predictive value. Disease No disease Positive 20 33 Negative 10 37 O a. 0.38 O b. 0.67 O c. 0.79 O d. 0.53 Calculate the positive predictive value. Disease No disease Positive 20 33 Negative 10 37 O a. 0.38 O b. 0.67 O c. 0.79 O d. 0.53 Calculate the odds ratio for the following table: Developed Covid Yes No Vaccinated 100 1900 Non vaccinated 80 7920 O a. 0.3 O b. 5.2 O c. 5 O d. 2.9