I assume that there is a naming scheme being used for the account state discriminators as seen here in the token metadata extension

    const SPL_DISCRIMINATOR: ArrayDiscriminator =
        ArrayDiscriminator::new([112, 132, 90, 90, 11, 88, 157, 87]); 

My questions are:

1. Whether the slice is chosen randomly or if there's meaning to each value in said slice.

2. Why an array discriminator as opposed to a hashed constant string value?