4. First order logic:

4.1. Consider a vocabulary with the following symbols:

Occupation(p,o): predicate. Person p has occupation o.

Customer (p1,p2): predicate. Person p1 is a customer of person p2.

Boss(p1,p2):predicate. Person p1 is a boss of person p2.

Doctor, Surgeon, Lawyer, Actor: constants denoting occupations

Emily, Joe: constants denoting people

Use these above symbols to write the following assertion in first order logic

a. Emily is either a surgeon or a layer

b. Joe is an actor, but he also holds another job.

c. All surgeons are doctors

d. Joe is not a customer of any lawyer

e. Emily has a boss who is a lawyer

f. There exists a lawyer all of those customers are doctors

g. Every surgeon has a lawyer.