New PMP Question & Answers with explanation

You are the project manager for BB Tops, a nationwide toy store chain. Your new project involves creating a prototype display at several stores across the country. You are using an agile methodology to manage your project and will be hiring contract services to help with this project. It's critical to the organization that this project succeed. You know which of the following are true?
Select three
Which process has the greatest ability to directly influence the project schedule?
Select one
You are the project manager for BB Tops, a nationwide toy store chain. Your new project involves creating a prototype display at several stores across the country. You are using an RACI chart to display individuals and activities. What does RACI stand for?
Select two
You have been hired as a contract project manager for Grapevine Vineyards. Grapevine wants you to design an Internet wine club for its customers. Customers must register before being allowed to order wine over the Internet so that legal age can be established. You know this project will require new hardware and an update to some existing infrastructure. You will have to hire an expert to help with the infrastructure assessment and upgrades. You also know that the module to verify registration must be written and tested using data from Grapevine's existing database. This new module cannot be tested until the data from the existing system is loaded. You are going to hire a vendor to perform the programming and testing tasks for this module to help speed up the project schedule. The vendor will be reimbursed for all their costs, and you want to use a contract type that will allow you to give the vendor a little something extra if you are satisfied with the work they do. You know all of the following apply in this situation except for which one?
Select one
Which of the following are constraints that you should consider when documenting the resource management plan?
Select one