Psychology bob sells lamps for a living. in order to people remember his telephone number, he requests the number 981-5267. bob advertises his number as 981-lamp. bob is hoping that will aid his customers in remembering his phone number.

alpha-numeric combination

Explanation:

Bob is hoping that  alpha-numeric combination   will aid his customers in remembering his phone number.

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.