How are these solved? Can someone explain to me?

1. The four-byte sequence 0x7B 0x8A 0x2F 0x92 stored in consecutive memory cells in a little-endian architecture represents ___________ (decimal) when interpreted as a 32-bit signed integer.

2. The four-byte sequence 0xC1 0xAC 0xDC 0x4B stored in consecutive memory cells in a little-endian architecture represents ___________ (decimal) when interpreted as a 32-bit signed integer.

3. The four-byte sequence 0xC8 0x85 0xFF 0x21 stored in consecutive memory cells in a little-endian architecture represents ___________ (decimal) when interpreted as a 32-bit signed integer.

4. The four-byte sequence 0xAA 0x8B 0x8C 0x4B stored in consecutive memory cells in a little-endian architecture represents ___________ (decimal) when interpreted as a 32-bit signed integer.