Complete a function that counts the number of tracks for each artist from a list of tracks. Each track is represented as a dictionary containing various fields, including a track_artist field that indicates the artist of the track.

Inputs:

• tracks: A list of dictionaries, where each dictionary represents a track and contains at least the following field:
  • track_artist: A string representing the artist of the track.

Steps:

• Iterate Through Tracks:

  • Loop through each track in the tracks list.
  • For each track, retrieve the track_artist value.
  • If the artist is already in artist_counts, increment their count by 1.
  • If the artist is not in artist_counts, add them with an initial count of 1.

• Prepare Result: Convert the artist_counts dictionary into a list of dictionaries, where each dictionary contains:

  • artist: The artist's name.
  • count: The number of tracks by that artist