I need answer with explanations. Thank you

What type of ethical dilemma does each of the following illustrate?

a. Due to the breakup with a client, an advertising agency suddenly finds itself representing rival companies.

b. A newly hired employee learns that the office manager plays computers games on company time.

c. An employee is asked to destroy documents that implicate his or her firm in wide spread

pollution.

d. A company spokesperson agrees to give a press conference that puts a positive spin on his or her firm's use of sweatshop labor.