Guys each time I calculare it I have 33 and from the answer it says 34 !?

anyone?

In a small office construction project, the following activities are scheduled in sequence. i) Digging and pouring footings - 5 days ii) Working on the slab and pouring - 3 days iii) Framing the floor - 5 days iv) Wall framing - 4 days v) Roof framing - 6 days vi) Insulation and drywall - 7 days vii) Interior doors and trim - 3 days viii) Hardware and fixtures - 2 days. What is the minimum time to complete the project if all activities are on a critical path except number viii, and activity iii is delayed by 1 day?
A. 32 days
B. 33 days
C. 34 days
D. 35 days