user: Name a few popular metal genres

assistant: Thrash Metal, Death Metal, Melodic Death Metal, Power Metal, Crossover, Grindcore, Symphonic Metal, Doom Metal, Death Core

user: Classify each of the numbers as prime or composite - 1, 2, 3, 10, 15

assistant: Modern mathematicians define a number as prime if it is divided by exactly two numbers. Since 1 can be divided by 1 and the number itself, which is also 1, so 1 is a prime number. By the same definition 2 and 3 are also prime numbers. Whereas, 10 and 15 are composite numbers as they can be divided by 4 numbers each. 10 can be divided by 1, 2, 5 and 10. 15 can be divided by 1, 3, 5 and 15.

user: Who is the company Sonova

assistant: Sonova Holding AG (Phonak Holding AG before 1 August 2007) is an internationally active Swiss group of companies headquartered in Staefa that specializes in hearing care (hearing instruments, cochlear implants, wireless communication). 

The Sonova group operates through its core business brands Phonak, Unitron, Hansaton, Advanced Bionics, AudioNova and Sennheiser. It is one of the largest providers in the sector worldwide. The group and its brands hold 24% of the global hearing aid market in sales. As of 11 September 2022, Sonova is a component of the Swiss Market Index.