3, 5, 7, 1, 2
Since you have to use five of them, numbers 4 and 6 would not go into the plan. The order above is the one that makes most sense to me.
If the dose requires that a total of 40 mg be given, then you take the ratio of the stock bottle (mg/mL) and solve for the total amount of mL that are needed by multiplying the amount of mL required (x):

Multiply by 5 on both sides to give:

Then solve for x:

Another, possibly quicker, way to solve would be to set up a proportion - one side the stock bottle ratio, and the other side the dosage requirements:

Cross multiply and you get:

And you would solve this the same way as above.
So
the patient should receive 9.091 mL of secobarbitol.
Because food can effect the glucose in your body
“Which of these” I don’t see any options to chose from
Answer:
The organ of the respiratory system are Nose, Trachea,Bronchus,Larynx,Paranasal sinuses,Lung,Pulmonary,alveolus,Pharynx,Bronchiole,Nasal cavity,Epiglottis,diaphragm