Explanation:

Man-Portable Air-Defence Systems (MANPADS)

• MANPADS are short-range, lightweight and portable surface-to-air missiles that can be fired by individuals or small groups to destroy aircraft or helicopters.
• They help shield troops from aerial attacks and are most effective in targeting low-flying aircrafts.
• MANPATs or Man-Portable Anti-Tank Systems work in a similar manner but are used to destroy or incapacitate military tanks.
• MANPADS have a maximum range of 8 kilometres and can engage targets at altitudes of 4.5 km.
• The first MANPADS were introduced by the United States and Soviet Union in the 1960s.

Hence both statements 1&3 are correct.