Here's the completed code:
```
# Import Dictionary
from gensim.corpora.dictionary import Dictionary
# Create a Dictionary from the articles: dictionary
dictionary = Dictionary(articles)
# Select the id for "computer": computer_id
computer_id = dictionary.token2id.get("computer")
# Use computer_id with the dictionary to print the word
print(dictionary.get(computer_id))
# Create a MmCorpus: corpus
corpus = [dictionary.doc2bow(article) for article in articles]
# Print the first 10 word ids with their frequency counts from the fifth document
print(corpus[4][:10])
```
The code imports `Dictionary` from `gensim.corpora.dictionary`. It creates a `Dictionary` object called `dictionary` by passing in `articles`. It obtains the id for "computer" using the `token2