A. Union means we combine all elements from F and E without duplicates.[tex]\mathsf{F \cup E = \{-3.5,\ -2.57,\ -2.04,\ -0.69,\ 1.42,\ 3.15\}}[/tex]B. Combine all elements of E and D (no repeats):[tex]\mathsf{E \cup D = \{-3.5,\ -2.57,\ -2.04,\ -0.69,\ -2.4,\ -1.7,\ 3.5,\ 8.09\}}[/tex]C. [tex]\mathsf{F \cup D = \{-2.4,\ -1.7,\ 1.42,\ 3.15,\ 3.5,\ 8.09\}}[/tex]Final Answer[tex]\text{a. } \mathsf{F \cup E = \{-3.5,\ -2.57,\ -2.04,\ -0.69,\ 1.42,\ 3.15\}} \\\text{b. } \mathsf{E \cup D = \{-3.5,\ -2.57,\ -2.04,\ -0.69,\ -2.4,\ -1.7,\ 3.5,\ 8.09\}} \\\text{c. } \mathsf{F \cup D = \{-2.4,\ -1.7,\ 1.42,\ 3.15,\ 3.5,\ 8.09\}}[/tex]