You are managing a database design project and just realized that there is a major flaw in your design. Your team determines that fixing the design flaw will result in two additional weeks of work, along with a $10\%$ increase in costs, but has no significant impacts on other project constraints. Not fixing the flaw, however, would result in a major security vulnerability that is unacceptable to the customer. What should you do next?

Fix the flaw immediately

Inform the customer of the design flaw

Create a change request

Determine the impact of the change