New PMP Question & Answers with explanation

A project manager is developing the schedule management plan for a data center migration project. The project sponsor asks for a schedule that plans all tasks as soon as possible. The project manager is presented with possible network paths that will not violate schedule constraints. What leads and lags relationship should the project manager select?
Select one
A project manager is uncertain about the duration of a new product and consults several groups of subject matter experts (SMEs). The first group advises that development can be finished in 30 days. The second group identifies some risks that could make the duration up to 45 days. The third group proposes a new development method that can shorten the time to 21 days. What is the estimated development duration for the new product?
Select one