Angus transmitting station

Columns: Frequency | UHF | kW | Operator | System
727.25 MHz | 53 | 100 | Channel 4 | PAL System I | 753.833 MHz | 56- | 2 | Arqiva ( Mux C ) | DVB-T | 759.25 MHz | 57 | 100 | BBC One Scotland | PAL System I | 777.833 MHz | 59- | 4 | SDN ( Mux A ) | DVB-T | 786.000 MHz | 60 | 20 | BBC A | DVB-T | 801.833 MHz | 62- | 4 | BBC ( Mux B ) | DVB-T | 807.25 MHz | 63 | 100 | STV | PAL System I | 825.833 MHz | 65- | 2 | Arqiva ( Mux D ) | DVB-T | 834.166 MHz | 66+ | 4 | Digital 3 & 4 ( Mux 2 ) | DVB-T

Example questions:
What is the UHF of the Angus transmitting station whose operator is a variation of BBC One ? | What defunct version of this free-to-air operator of the Angus transmitting station closed down in June 2018 ? | Among the operators under the Angus transmitting station with a kW of 100 , which one has its own team of continuity announcers ? | How many transmission sites belong to the network of the Angus transmitting station whose system is also used by the US by Amateur television operators ?

Answers:
57 | STV2 | BBC One Scotland | over 1,000