As a network administrator, it is a good idea to have a performance ____________, a collection of performance data from a time when the network is performing normally, which can be used as a point of reference.

All programs can be written in terms of three types of control statements: ____________ , _____________ and ____________ .

Fill in the blank(s) with the appropriate word(s).

The ABC Company has a total of 600 employees working in three divisions. Compute the average age of the employees in the entire company, given the number of employees and the average age of each of its three divisions: