Sandra spins the pointer of a spinner. The spinner has four equal sections labeled 1 to 4. Complete parts a and b.
a. The probability that the pointer will land on a number less than 5 is

nothing
.
​(Type an integer or a​ fraction.)
b. Complete the sentence to describe the likelihood of landing on a number less than 5.

It is
▼

unlikely
certain
impossible
likely
that the pointer will land on a number less than 5.