Although sleep requirements vary from person to person most teens are recommended to get how many hours of sleep per night

About 8-10 hours of sleep. You don't want to get to much sleep and you don't want to little of sleep. Both to much and to little will not let your brain function that well because it is not well rested in the proper amount you need

when in a crucial situation, after calling 911, the correct posture for delivering effective compression is the proper hand placement.

first, place two fingers at the sternum, then put the heel of your other hand next to the fingers and place hand on top of the other. lock your elbows by using your body’s weight and compress the victim’s chest with a depth of 2 inches.

moreover, do 15 compression and 2 breaths, this process must be done four times until there is a pulse or a arrive.