Q--Would a slingshot be improperly classified as artillery?
A--My step-by-step reasoning: Artillery refers to ranged weaponry that is predominantly used in breaching fortifications. Examples of artillery include: howitzers, mortars, and rockets. Mortars can have a range up to 4,680m. A slingshot is a string weapon that propels a rock or other small projectile. Some slingshots can fire projectiles up to 9m.
So, the answer is yes.

Q--If you have a serious injury in Bangladesh, would you probably dial a Fibonacci number?
A--My step-by-step reasoning: The number for emergency services in Bangladesh is 999. 999 is not a Fibonacci sequence integer.
So, the answer is no.

Q--Is Christopher Walken close to achieving EGOT status?
A--My step-by-step reasoning: EGOT refers to people that have won an Emmy, a Grammy, an Oscar, and a Tony Award. Christopher Walken won the Oscar in 1979 for Best Actor in a Supporting Role. Christopher Walken was nominated for two Tony Awards but has never won. Christopher Walken was nominated for an Emmy Award but has never won. Christopher Walken has never been nominated for a Grammy.
So, the answer is no.

Q--Do most fans follow Katy Perry for gospel music?
A--
My step-by-step reasoning: Katy Perry's gospel album sold about 200 copies. Katy Perry's most recent pop albums sold over 800,000 copies.
So, the answer is no.