Final answer:
The provided sentences about Roberto demonstrate proper use of a semicolon to connect related independent clauses and a colon to introduce a quotation.
Step-by-step explanation:
Roberto is a hardworking student who always completes his assignments on time. The passage states that 90% of A and B students begin their essays at least two weeks before they are due.
Roberto is a hardworking student; he always completes his assignments on time. In the passage, the author states, "90% of A and B students begin their essays at least two weeks before they are due" (Flynn).
Roberto excels in both academics and athletics; his dedication is evident in his straight A grades and the trophies he has won. While discussing his future plans, he confidently shared his philosophy: “To achieve greatness, one must set goals and tirelessly pursue them.” (Johnson, 2021).