Determine the missing statement and reason in the following proof. Given: is tangent to at point ; is tangent to at point Prove: Statements Reasons 1. is tangent to at B 1. Given 2. is tangent to at D 2. Given 3. 3. Two tangent theorem 4. ? 4. Radius-tangent theorem 5. 5. Reflexive property of congruence 6. 6. ?