A 3-star hotel conducted a poll among its staff to ascertain the level of stress and job satisfaction. Comparing the responses of male and female staff on a question on job satisfaction provided the following data:

(Sex of Respondent) : (Level of Job Satisfaction)

Female Satisfied: 20

Female Unsatisfied: 10

Male Satisfied: 30

Male Unsatisfied: 40

Denoting by -Sthe event that an employee is Satisfied in their job

Mthe event that a respondent is a Male

Fthe event that a respondent is a Female

(A) If one staff member is selected randomly, determine the following probability;

P (S)

(B) If one staff member is selected randomly, determine the following probability;

P (M S)

(C)If one staff member is selected randomly, determine the following probability;

P (S | M)