1. Some people think that the print media is a dying industry, but there are still many out there who love to read newspapers and magazines.2. If you cannot use a computer now you are behind the times.3. It seems everyone around us has a smart tablet, which makes us want to have one too. Otherwise we may feel out of place or socially awkward.4. Due to the toxic hazard involved, the use of CDs has been largely reduced in the last decade.5. The Xbox game console has been obsolete and the GameCube game console has been outdated. The PlayStation 9 is one of the modern game consoles.
 a dying industry behind (the times) out of place outdated obsoletea dying industry 指快死掉的產業，有落伍的意思，behind (the times) 用來形容一個人想法落伍或技能老舊，而 outdated 跟 obsolete 則用來形容東西的落伍。
I have been wrecking y brain on this tough math question but I still cannot solve it.