my father is suffering from adenosqumoua carcinoma of lungs,upper lobe on left side. his age is 74 yrs.treatment started in november 2013 with cemotherapy cisplatin + gemitibine. 6 cycle. again cycle of docifact. Again started radiaion. but after 6 radiation , stopped due to weakness. now its 1 month we stoped the treatment.

what is life expectency in this case after we stopped the treatment.
what should be next treatment because he is very weak now.