What Is The Life Expectancy In A Person With Stage 4 Lung Cancer?

Hi, I have stage four lung cancer and just found out today that it has triggered anexeria! My taste buds are not working due to CHEMMO treatments and my appetite is nil and if I do manage to get something solid down my stomach I throw it up. I and 71,5 years . Is there any hope for me? My email address is YYYY@YYYY