Everytime I go to the beach I get sunburned I guess I should stop going to the beach

Can someone explain this to me clearly plz

How can you sit there calmly eating muffins when we are in this horrible trouble i cant make out you seen to me to be perfectly heartless who said this quote

Identify the sentence in which the underlined word or words are punctuated incorrectly. a) pam was (well prepared) for the debate. b) she had (read three quarters) of the material more than once. c) she has always been (self assured). d) the winner needs a (two-thirds) majority of the votes.