Your team is estimating work using planning poker. All team members agree that the work size is 5 , except for Bob. Bob thinks it should be 10 in size. What could the reason be for this discrepancy? It could be due to product uncertainty or technical uncertainty. Bob is being difficult so that he can add padding to his work. The team should have used T-shirt sizing to get a better result. The team should talk to the Scrum Master for leadership in the matter