Can someone me out? last question says how does packet switching work

Consider the simple 3-station assembly line illustrated below, where the 2 machines at station 1 are parallel, i.e., the product only needs to go through one of the 2 machines before proceeding to station 2.what is the throughput time of this process?

Avariable of the data type arrays is storing 10 quantities. what is true about these quantities? a. the quantities all have different characteristics. b. the quantities all have the same characteristics. c. five quantities have the same and five have different characteristics. d. it is necessary for all quantities to be integers. e. it is necessary for all quantities to be characters.

For a typical middle-income family, what is the estimated cost of raising a child to the age of 18? $145,500 $245,340 $304,340 $455,500