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A certain passcode is required to be a sequence of any 3 digits chosen from the ten digits followed by 2 letter chosen from the set {a, b, c, d}. (1) How many passcodes are possible if repetition of digits and letters is allowed?  [a1] (2) How many passcodes contain no repeated digits and no repeated letters? [a2] (3) How many passcodes are possible if repetition of digits is allowed but no repeated letters? [a3] (4) What is the probability that a passcode chosen at random has at least one repeated digit or one repeated letter,  assuming that all passcodes are equally likely? (Please fill the blank with a numerical value in the form of m/n, where m and n are positive integers.) [a4] In (1), (2) and (3), please enter your answers as integers.

 Assume you have the following jobs to execute with oneprocessor:Process Arrival time  Burst time p_0        0                    7 p_1        1                    5 p_2        2                    3 Calculate and show the average wait time for this set of processes using the followingalgorithms.  Specify the arbitration rule used for each algorithm, ifneeded. Assume no time taken by scheduler. Show your work.a) Shortest job next (non-preemptive)b) Shortest remaining time next (pre-emptive)c) Round robin, with a quantum of 3

The linux fair scheduler always schedules the processes in the highest priority queue. How does it make sure that the lower priority processes are not starved?

Which of the following situations would require an additional blood pressure measurement?

Select the correct syringe/needle combination for an IM injection from the images below:

Which of the following images shows the correct measurement of a 0.5 mL vaccine dose? For reference, the dose is being measured in the empty syringe pictured here: 

Which of the following images shows that the correct cuff size has been selected for this patient? 

On the picture below, which arrow indicates the correct location of the radial artery? 

Type your answer to each question in the box provided. Refer to the image below to answer the first part of the question.  Part 1) Which arrow (A or B) points to the part of the stethoscope that should be used when listening to blood pressure sounds? [label] Part 2) What is the name for this specific head of the stethoscope?  [name] 

If after administering a vaccine the needle safety mechanism fails, what should you do?