Monobactams carbapenems

Meropenem and aztreonam BOTH have activity against which of the following infections?

1: Methicillin-resistant Staphylococcus aureus (MRSA) pneumonia
2: Methicillin-sensitive Staphylococcus aureus (MSSA) necrotizing fasciitis
3: Pseudomonas aeruginosa urinary tract infection
4: Streptococcus pyogenes cellulitis