the right of survivorship

44. [LO 3] Last year Nate opened a savings account with a deposit of $15,000. The account was in the name of Nate and Derrick, joint tenancy with the right of survivorship. Derrick did not contribute to the account, but this year he withdrew $5,000. Has Nate made a complete gift, and if so, what is the amount of the taxable gift and when was the gift made?