Percent of 2 first principal components

General
1

I need to calculate this: what portion of the total information is maintained by the first two principal components in the two cases?

I have calculated PCA using this function, but I got stuck while trying to calculate the proportion of two first principal components. Can you kindly help me with this?

PCA = prcomp(swiss, center = TRUE, scale = TRUE)

PCA

2

try the summary() function on PCA

3

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