My 39 yr old brother just had a 3x3x6cm tumor removed, just diag w/ glioblastoma, with chemo/radiation how long will he be with us?

Prognosis: The glioblastoma is very bad rare brain tumor. The aggressive surgery, meaning 92%to 98% taken out, plus radiation plus telozolomide can have 2 year survival rate upto 27%. Unfortunately it comes back in two years. Over all 5 year survival is around 8%. I wish your brother good health ; sympathy with you on going through difficult time. Thanks.