Answer:
1. "The drawing, an authentic work, was found in Picasso's sketch book." I believe this is correct in context and grammatically.
Explanation:
2. "The instructions were written in iambic pentameter." is mostly correct, however iambic pentameter is the measure of a line or rhythm in a poem, not instructional manuals.
3. "The poet paid homage to the evil killer by eulogizing him in an epic poem." although used correctly, eulogizing someone means to praise or extol them, therefore I don't think this is correct in context, as the poet would be praising the evil killer.
4." Blake showed his maturation when he snuck a piece of pie from the kitchen." this sentence is mistaking "maturation," which means becoming mature, for "mischievous."
