Your project has a tight deadline, and planning needs to start immediately; otherwise, there may be risks of delays. The sponsor has not signed the project charter and will not be available for another two weeks. What should you do? Group of answer choices Explain the urgency of the situation to the sponsor but do not start work until you have a signed project charter. Explain the urgency of the situation to the sponsor but start planning the project. You can have the sponsor sign the project charter when they are available. Explain the urgency of the situation to the sponsor and request senior management assign another sponsor. Explain the urgency of the situation to the sponsor and escalate to senior management for resolution