the range(a,b)

Question

the i in the range(b) is interger, and 0≤i<b.
the i in the range(a,b) is interger, and a≤i<b.
the i in the range(a,b,c) is interger, and a≤i<b,i=a+k*c(k∈Z).

Answer 1

just a note😃. i don't know where could be noted

Answer 2

not looks looks like a question

Answer 3

😂✌✌