Match the bad data item with the constraint that checks for it: format constraint * 5 points
a= a person's age is -18.
b=a person's age that is to be an integer is listed as "21years".
c= all data records must have an age value, but a record has the age missing.
d=two people have the same social security number (which is impossible) in the data set.
e=a person has their weight listed as "135.7" when the number should have exactly two places to the right of a decimal point.

1. which of the following statements are true about routers and routing on the internet. choose two answers. a. protocols ensure that a single path between two computers is established before sending packets over it. b. routers are hierarchical and the "root" router is responsible for communicating to sub-routers the best paths for them to route internet traffic. c. a packet traveling between two computers on the internet may be rerouted many times along the way or even lost or "dropped". d. routers act independently and route packets as they see fit.