I don't know what the 1.6 means but if an individuals skin has a rash,itching or bubbling these should be reported or one should see a doctor, these can be a cause of a allergy or wrong medication.
D because they also make your shoes not sweat
Yea absolutely you already know
Although sleep requirements vary from person to person , most teens are recommended to get 8 hours of sleep per night.
Andy gained muscle, so his shirt was tight in the arms most likely