HELP Could anyone please interpret these data for me AS SOON

HELP! Could anyone please interpret these data for me AS SOON AS POSSIBLE...

How much additional variance is accounted for by all 3 predictors compared to age alone?

What do these findings suggest about the factors that influence blood pressure?

Describe the findings on R^2.

How much variance in Systolic blood pressure is accounted for by age alone? b for age?