List the answers and I will give brainliest AND all my points

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

The graph represents f(x)=[x]+3. what is f(-2.2)?