Under GA 1026 and GB 7258-2017 standards, what are the statutory requirements regarding emergency safety hammers (安全锤) on passenger coaches?

1. Emergency safety hammers must be fully equipped in specified quantities, mounted securely in clearly visible, easily accessible positions next to emergency exit windows, and equipped with anti-theft alarms or functional pointed steel heads
2. Safety hammers may be locked in the driver's private toolbox under the front seat
3. Only one safety hammer is required per 50-passenger coach
4. Safety hammers can be replaced with plastic beverage bottles