.Todd is 45 years old. His son is 9 years old. How many times older is Todd than his son? Choose the answer that correctly identifies the knowns and unknowns for this problem. known: Todd’s age and his son’s age; unknown: how many times older Todd isknown: son’s age; unknown: Todd’s age and how many times older Todd isknown: Todd's age and how many times older Todd is; unknown: son’s ageknown: how many times older Todd is; unknown: Todd’s age and his son’s age