remembering that the PCs are linear combinations, the coefficients in which are the eigenvectors. That is$,$ the k$-$th eigenvector is the set of coefficients in the k$-$th PC$.$

$5.$ PC$1$: SYS and DIAS are important, having large loadings. PC$1$ can be interpreted as $?$

$($A$)$ total BLOOD PRESSURE or BLOOD PRESSURE INDEX.

$($B$)$ SIZE $($C$)$ AGE $($D$)$ OVERWEIGHT

$6.$ PC$2$: Weight and Height are important, having the same sign. PC$2$ is interpreted as $?$

$($A$)$ total BLOOD PRESSURE or BLOOD PRESSURE INDEX.

$($B$)$ SIZE $($C$)$ AGE $($D$)$ OVERWEIGHT

$7.$ PC$3$: Only AGE has a large loading. This is a measure of $?$

$($A$)$ total BLOOD PRESSURE or BLOOD PRESSURE INDEX. $($B$)\_$ SIZE $($C$)$ AGE $($D$)$ OVERWEIGHT

$8.$ PC$4$: WEIGHT is contrasted with HEIGHT, having a opposite sign. This can be interpreted as $?($A$)$ total BLOOD PRESSURE or BLOOD PRESSURE INDEX. $($B$)$ SIZE $($C$)$ AGE $($D$)$ OVERWEIGHT

$9.$ PC$5$: SYS is contrasted with DIAS, having opposite signs. This is a measure of $?$

$($A$)$ total BLOOD PRES SURE or BLOOD PRESSURE INDEX.

$($B$)$ SIZE $($C$)$ AGE $($D$)$ DIFFERENCE between SYS and DIAS