As given by the question
There are given that the equation of Fahrenheit and Celsius:
[tex]\begin{gathered} C=\frac{F-32}{1.8} \\ F=1.8C+32 \end{gathered}[/tex]
Now,
(a). Put 4o degrees F into the equation of Fahrenh:
[tex]\begin{gathered} F=1.8C+32 \\ 40=1.8C+32 \\ 1.8C=40-32 \\ 1.8C=8 \\ C=\frac{8}{1.8} \\ C=4.44 \end{gathered}[/tex]
Hence, the value of the first option is shown below:
[tex]4.44^{\circ}C[/tex]
(b). Put 35 degrees Celsius into the equation of Fahrenheit:
[tex]\begin{gathered} F=1.8C+32 \\ F=1.8(35)+32 \\ F=63+32 \\ F=95 \end{gathered}[/tex]
He