your project has atight deadline andd planning needs to start immediately otherwise there may be risks of delays.the sponser has not signed the project charter and wil not be available for another two weeks. what should you do$?$a$.$ do not start the work until you have signed project charter. b$.$ start planning the project and you can have the spondsor sign the project charter when they are available c$.$ request senior management assign another sponsor d$.$ escalate to senioir management for resolution?