Consider the GBN protocol with a sender window size of 5 and sequence number range of 1024. Suppose at time t, the next in-order packet that the receiver is expecting has the sequence number 40. Assume that the medium does not reorder messages. Answer if the following is possible or not possible, and explain in 2 sentences why it is possible or not possible. a. What are the possible sets of sequence numbers inside the sender's window at rime t?
b. What are the possible values of ACK field in all possible messages currently propagating back to the sender at time t?

When using a public computer or network, you should always

Which is the correct sequence of steps to set up a document in landscape orientation? a. select page setup from the file menu. then click the margins tab and select landscape. b. select page setup from the edit menu. then click the margins tab and select landscape. c. select page setup from the insert menu. then click the margins tab and select landscape. d. select page setup from the format menu. then click the margins tab and select landscape

Write a function balancechemical to balance chemical reactions by solving a linear set of equations. the inputs arguments are: reagents: symbols of reagents in string row array products: symbols of products in string row array elements: elements in the reaction in string row array elcmpreag: elemental composition of reactants in two dimensional numeric array elcmpprdcts: elemental composition of prducts in two dimensional numeric array hint: the first part of the problem is setting up the set of linear equations that should be solve. the second part of the problem is to find the integers from the solution. one way to do this is to mulitiply the rational basis for the nullspace by increasing larger integers until both the left-and right-side integers exist. for example, for the reaction that involves reacting with to produce and : reagents=["ch4", "o2"]; products =["co2", "h2o"]; elements =["c","h", "o"] elcmpreag=[1,4,0;