Data on students' vaccine status and mask use are presented in the contingency table. Calculate and interpret each of the following, and please show your work.

a. Probabilty of not wearing a mask given being vaccinated

b. Probabilty of not being vaccinated and not wearing a mask.

c. Probabilty of being vaccinated or wearing a mask

d. Probabilty of not being vaccinated given wearing a mask.

	Vaccine+	Vaccine-
Mask +	307	203
Mask -	1557	1147