In the DRAM computer chip of Problem 94, suppose the two parallel plates of one cell's 35-fF capacitor are separated by a 2.0-nm-thick insulating material with dielectric constant K = 25.

(a) Determine the area A (in μm2) of the cell capacitor's plates.

(b) If the plate area A accounts for half of the area of each cell, estimate how many megabytes of memory can be placed on a 3.0-cm2 silicon wafer. (1 byte = 8 bites.)