Arthur and Mary Mitchell (ages 64 and 52, respectively) file a joint tax return. Mary is legally blind. The Mitchells provided over half the support of their two unmarried children (Larry and Tammy) and Mary's mother (Alice Fisher). Larry, Tammy and Alice live with the Mitchells the entire year. Alice has no gross income. Larry (age 25) is a full-time university student with $4,400 of earned income. Tammy (age 21) is a part-time university student with $4,170 of earned income. The number of total personal and dependency exemptions Arthur and Mary Mitchell can claim on their 2017 tax return?