Can You identify these probably Romans copper coins?

1. Coin.  Size 16.8 mm thickness 1.2 mm.
 

2. Coin.    Size 19.0 mm thickness 1.45 mm
                Issuer Constantius II
                FEL TEMP REPARATIO
 

3. Coin     Size 15.6 mm thickness 1.2 mm
                Issuer VALENS, AD 364-378.
                Gloria Romanorvm
 

4. Coin    Size 15.0 mm thickness 1.4 mm
                Issuer: Constantius Gallus ???
 

5. Coin     Size 16.1 mm thickness 1.6 mm
                Issuer: Gratian ???
                Gloria Romanorum