networking

[logistic_guy]

here is the question

Look at the network and answer the following questions:

(a) How many subnets and how many hosts per subnet does the network have?
(b) For each subnet, find the network address, the broadcast address, and the range of valid IPs.
(c) State two valid IPs for each subnet not mentioned in the network.
(d) What subnet mask was used to create this network?
(e) How many network and host bits are there in the subnet mask?
(f) What is the block size of the subnet mask?
(g) What class of IP addresses does this network fall under?
(h) Use the subnetting formulas to answer the same questions.



my attemb
i think $\displaystyle 192.168.10.5$ and $\displaystyle 192.168.10.6$ is valid ip
am i correct?