________ is a time-series method used to estimate the average of a demand time series by averaging the demand for the n most recent time periods

A broker present an offer on behalf of her buyer. The offer is accepted, escrow is open, and the transaction closes 45 days later. The broker must keep the contract and the file of the transaction for three years but dating from which event?

a. From the date the purchase contract was signed by the buyer. b. From the date the purchase contract was accepted by the seller. c. From the date escrow was opened. d. From the date escrow closed.

If you were to use Lewin's three-step model amended with an additional step, where does the fourth step go in the original model?

A) Before the first step B) Before the second step C) Before the third step D) After the third step