In the question below is a statement followed by two conclusions numbered I and II. You have to assume everything in the statement to be true, then consider the two conclusions together and decide which of them logically follows beyond a reasonable doubt from the information given in the statement:

Statements: Covid-19 pandemic affected the population of old people as most of them have low immunity.

Conclusions:

I. All old people have low immunity.

II. The population of old people is decreased by 20%.