can you answer these questions?

1)What advantage does a packet-switched network have over a circuit-switched network? a. It must establish a connection (a circuit) between the sender and the receiver b. It is subject to variable delays and possible information loss c. It guarantees a constant transmission rate and a high quality for each connection d. It allows better sharing of resources

2)Which of the following is not a typical use of static routing? a. Configuration of the gateway of last resort b. Configuration of the default gateway c. Configuration of a rarely changing route d. Configuration of a route changing very often