After getting a warning about heart health from his doctor, malcolm has decided to end his 20 years of smoking. what will most likely be the state of his health in four years' time?

Depending on his age and location , but most likely COPD emphysema TB or lubg cancer

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.