A parallel-plate capacitor with dimensions of 100 mm by 25

A parallel-plate capacitor with dimensions of 100 mm by 25

A parallel-plate capacitor with dimensions of 100 mm by 25 mm and a plate separation of 3 mm must have a minimum capacitance of 38 pF (3.8 ( 10-11 F) when an ac potential of 500 V is applied at a frequency of 1 MHz. Which of those materials listed in Table 18.5 are possible candidates? Why?