"From 10AM to 4PM are the most dangerous hours for exposure to the sun."
The first two don't make any sense. As for SPF, the FDA minimum is 15 but the recommended minimum is 30. 10AM-4PM are the peak sunlight hours, generally (unless you live in Antarctica of course).
Exercise needs vary on individuals for many reasons. First of all, it could be physical problems like weight. If a person is to heavy, or to small. Then starting out exercise slow is best. Often times over exercising for obese people, or people who are to thin, can cause blackouts, a loss of water retention, and exhaustion.
Another could be health issues. People with certain health issue may find it hard to work out, and need help with finding what works best for them.
if you do c then I think it will be more accurate! XD
The best route is through a nebulizer that will be connected to his mouth breather.