<u>Answer:</u> The amount of drug that must be given is 102.3 grams
<u>Explanation:</u>
We are given:
Weight of the person = 150.0 lb
Converting this weight into kilograms, we use the conversion factor:
1 kg = 2.20 lb
So, 
Applying unitary method:
For 1 kg of body weight, the correct dosage of the drug is 1.50 mg
So, for 68.2 kg of body weight, the correct dosage of the drug will be
Hence, the amount of drug that must be given is 102.3 grams
The dorsal root is the afferent sensory and carries sensory information to the brain
I'm not sure that this is 400 words but this is what I came up with.