3..You can't sleep when you realize that one friend you trusted, is gone..3

that's sad :( but hopefully things get better

What friends? I have none Maybe thats why i sleep so badly

your question is incomplete

explanation:

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.