Your company uses an accounting calendar with periods that are identical to calendar months. A contract resource has been identified to work for six months on an accounting close cycle project. The resource is planned to start with 10 days left in the first period and to end 20 days into the last period. For the remaining periods, the resource must be loaded on all working days of the month. You are required to distribute the budget, forecast, and planning amounts across periods based on the task duration.
Which predefined spread curve must be used to meet this requirement?