Final answer:
The informal part of the sentence to be changed is 'was no biggie'. A formal alternative could be 'was not a significant difficulty' or 'was easily achieved'. Correct use of commas and verb forms in similar sentences is also shown.
Step-by-step explanation:
The part of the sentence that is informal and needs to be changed is 'was no biggie'. Instead of using the colloquial expression 'no biggie', which means 'not a big deal', a more formal choice would be to say 'was not a significant difficulty' or 'was easily achieved'. This maintains the formality of the writing.
Here are examples of commas usage and phrases analysis for other sentences:
- I finally found my keys, and I got to work just in time.
- Though Susan wasn't feeling well, she went to the store anyway and bought ice cream, pizza, and candy.
- The balcony collapsed because of a poorly manufactured steel I-beam.
In the context of verbs and their correct forms:
- There are fewer criminals on the street since the law was passed.
- Potassium and water are a dangerous combination!