Hi guys, can somebody please help me, Can you show your work as well please, and can you also explain this because I don’t understand at all

Given that anna wants to spend less than $60 for the subscription and only full month subscriptions are offered, what is the maximum number of months that ana can subscribe

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Can someone pls ! pls answer all. no explanation needed..