Bella enjoys interacting and hanging out with her groupmates at work. They find her to be very warm and kind. Even so, most people do not like working with her because she is sloppy and not very detail oriented. Based on this, we can conclude that Bella is:

An Expresser

Explanation:

Expresser is a type of personality dimensions that describes Expressive Personality, it is defined as a type that loves to be among group, and enjoy the adventures participation, most especially when all the groups are involved.

They are naturally enthusiastics, love to work with others and have the ability to inspire others. However, Expressers can be sloppy sometimes due to their impatience nature, and less detailed oriented because of their tendency to generalize often than necessary.

Other types of personality dimensions are:

1.  Collaborators: personality that constitute a great deal of  reserve, more effective, and less cognitive

2.  Deliberators: a personality that is characterized with Detail oriented, calculating, less effective and more cognitive.

3.  Directors: this is a Goal oriented  personality, well determined, less effective and more cognitive

In this case, we can conclude that Bella is an Expresser because she has energetic, social interactive and influencing attitudes but with less cognitive traits.

the answer to your question is,

old stone age.

-mabel < 3