I need these challenging questions answered as soon as possible!!

1.Students were a sent in a flower field and were asked to pick those flowers desirable in their eyes. Each flower would then be used to represent the whole population. Which method of selection did the students apply?

2.Six balls containing all sorts of colors are placed in a bag and a student told to pick a random ball. How many possible outcomes are there for any type of ball to be picked by the student?

3.Determine the value for z whereX(z)=0. Explain

4.Solve forlimzX(z) given that the value of x(n) is causal.

5.Give three examples of valid authentication methods.

6.Determine the function of the initial window size parameter in the opening phase of a channel.

7.Determine the number of addresses given that 167.199.170.82/27 represents the classless address.

8.Determine the truth value given that Internet Corporation for Assigned Names and Addresses is abbreviated as ICANN.

9.Find the number of XOR gate operations that are usually involved in the S- box permutation.

10.Describe the representation of the value of the expected workload that is used to find a message that hashes to that value.