Graham, age 42, was covered by a traditional medical expense insurance plan for the first ten months of this year. In november, he switched to a self-only hdhp and set up an hsa. Assuming that the maximum hsa contribution for single coverage for the year is $3,600. What is the maximum amount graham can contribute to his hsa for this year?

a. $0
b. $583
c. $2,917
d. $3,600