Protein Synthesis Biology 30

I have attached a photo to help answer the question, thanks.
A random list of events that occur in protein synthesis
1) amino acid picked up by tRNA
2) polypeptide chain being joined by peptide bonds
3) nucleic acid moves through the cytoplasm to the ribsome
4) semi-conservation formation of DNA
5) synthesis of mRNA by transcription
6) tRNA antipode matches mRNA codon

Numerical Response
Choose the correct numbered event that matches the letter labelled on the diagram above

____  ____    _______  _____
W           X            Y            Z