IS who preposition or conjunction?

Can someone translate the swahili word 'cheo' for me ? i do not understand.

Monroe just left his second job in the marketing, sales, and service career pathway. he was self-employed at his first job, and worked for a nonprofit for his second job. he recently took another job in logistics and distribution.

Which sentence correctly uses a colon to denote a list or enumeration? a. each group will have members fill the following roles: leader, note-taker, and time-keeper. b. our toughest monthly sales goals are in: january, july, and august. c. marketing, distribution, and customer service: are the focus areas for 2017. d. the company will be opening two new offices in: harrisburg and reading.