Answer:
1. The kind of competition Sandy joined was a writing competition.
2. From the text, we can infer that the writer was proud of Sandy because Sandy was a female who was the most successful at the competition.
Step-by-step explanation:
From the passage, we discover that from Mrs. Karina congratulatory message to Sandy, Sandy was actually part of a writing competition which involved synopsis writing.
Also, Mrs. Karina congratulated Sandy and was proud of her because she tends to be the only female that was successful in the writing competition to emerge as the second position winner.