Moel-y-Parc transmitting station

Columns: Frequency | UHF | kW | Service | System
546.000 MHz | 30 | 0.25 | Arqiva ( Mux C ) | DVB-T | 578.000 MHz | 34 | 0.25 | Arqiva ( Mux D ) | DVB-T | 639.25 MHz | 42 | 100 | S4C | PAL System I | 666.000 MHz | 45 | 20 | BBC A | DVB-T | 695.25 MHz | 49 | 100 | ITV1 Wales | PAL System I | 719.25 MHz | 52 | 100 | BBC One Wales | PAL System I | 770.000 MHz | 58 | 1 | Digital 3 & 4 ( Mux 2 ) | DVB-T | 794.000 MHz | 61 | 1 | SDN ( Mux A ) | DVB-T | 818.000 MHz | 64 | 1 | BBC ( Mux B ) | DVB-T

Example questions:
For the Moel-y-Parc system that is known as the Phase Alternating Line , what is the name of the service ? | Where is the headquarters situated for the Moel-y-Parc service with the UHF 30 ? | For the Moel-y-Parc service entirely owned by ITV plc , what is the system ? | What is the complete number of staff for the service at the Moel-y-Parc transmitting station whose kW is 20 ?

Answers:
S4C | Crawley Court | DVB-T | 35,402