Part $4.$ Translations $[3$ pts$.$ ea$,$; $9$ pts$.$ total$]$

For questions $20-22,$ use the following translation key:

a stands for 'Aki'. $,Qx$ stands for $\text{'}x$ is quiet' $,xy$ stands for $\text{'}x$ is talking to $y\text{'}$

Translate each of the following sentences into QL$.$

Aki is talking to himself.

Aki is quiet only if someone is talking to him.

Aki is the only one who is quiet.