PLZ HELP DUE IN 20 MINS

just need help with the first calculation and then I can finish but IDK how to get the partial pressure

It’s first 610 then after 755.10

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .