For question 4, the word with a different stress pattern is **C. instant**. The stress is on the first syllable (IN-stant), while the other words (engaged, happy, silly) have stress on the second syllable.

For question 5, the word with a different stress pattern is **D. emoji**. It has a different syllable structure and stress compared to the other words (inventor, creative, media), which have stress on the second syllable. Emoji has the stress on the second syllable (e-MO-ji or e-MO-ji). The stress patterns of each may somewhat vary based on regional accents; thus, I'm considering typical American English stress patterns.