#### Answer

(a) The Junior bag can be used at temperatures beginning at 41 degrees Fahrenheit.
(b) The liner is designed for 32-59 degrees Fahrenheit.

#### Work Step by Step

(a) Use the formula to convert 5C.
$F=\frac{9\times C}{5}+32$
$\frac{9\times5}{5}+32=\frac{45}{5}+32=9+32=41F$
(b) 0C is 32F.
Use the formula to convert 15C.
$F=\frac{9\times C}{5}+32$
$\frac{9\times15}{5}+32=\frac{135}{5}+32=27+32=59F$