Answer:
Machining
Explanation:
Drilling is a machining operation. It involves using a cutting tool to alter the shape.
Direct because it’s going right in the spot it needs to be in
Answer:
Explanation:
effective delay = delay when no traffic x 
effective delay = 
Answer:
See Explanation
Explanation:
The question is incomplete as the data set are missing. However, I'll use the following data to answer your question:
<em>5,12,3,18,6,8,2,10
</em>
Start by calculating the mean:




Standard deviation is calculated using:

This gives:






<em>Apply the above steps in the original question, then you will get your correct answer.</em>