Each cell in the table below represents a 4-byte block. The value in one or more adjacent cells (yellow background) represents the size of that object (for example the first object is 12 bytes or 3 blocks). The total heap size is 80 bytes or 20 blocks. 12 8 4 4 16 8 4 Based on the current allocation state, what is the external fragmentation of this heap? O 16 bytes or 4 blocks 12 bytes or 3 blocks 20 bytes or 5 blocks 24 bytes or 6 blocks