Among $150$ faculty members in an institute, $55$ are connected with each other through Facebook$^®$ and $85$ are connected through WhatsApp$^®$. $30$ faculty members do not have Facebook$^®$ or WhatsApp$^®$ accounts. The number of faculty members connected only through Facebook$^®$ accounts is _________.
- $35$
- $45$
- $65$
- $90$