Which of the following is CORRECT regarding staggered arrival phases?

Which of the following is CORRECT regarding staggered arrival phases?
 
  a. The first arrival phase should include those tables that will turn over the least.
  b. If the number of table turns is between 2 and 3, we need to create 4 arrival phases.
  c. The number of arrival phases = n+(n+1), where n is the integer value of the seat turnover percentage.
  d. The number of arrival phases = n+(n+1), where n is the integer value of the table turnover percent.
  e. The number of arrival phases = n+(n+2), where n is the integer value of the seat turnover percentage.