I have to select two for each of the Plan Do Check Act Cycle. I cant get them all right. Please help me. Here is the list to select two for each (Plan, Do, Check, Act)

Assess the cost of potential new products or service

Market, sell, and deliver products and services to customers

Determine business unit financial and nonfinancial performance

Reward (and occasionally punish) employees

Estimates the cost and profit consequences from a course of action

Modify product mix

Operate and improve processes

Determine cost of serving customers