d) When Stop and Wait is used on the complete path between A and B, the Frame is error free if there is no error during the first wireless transmission and there is no error during the second wireless transmission. Find the Frame Error Rate FER in this case, then find the effective data throughput from A to B assuming now that Stop and Wait is used on the complete path between A and B.

Think about the foreign-key constraint on the instructor's department name property. Please provide examples of additions and deletions that could go against the foreign-key restriction.

Open the Missing Addresses query in Design view. Add a new column to determine if a customer does not have an address on file. If the customer’s Address is null, it should display Missing. If not, it should display nothing. Name the column AddressPresent. Add criteria of Missing to the column you just created, so only the customers missing an address display. Move the AddressPresent field so it appears between PhoneNumber and Address. Run the query. Ensure only customers with null Address fields display. Save and close the query.

q19- Please choose for each line from step 1,2,3,4,5