2.7. For N₁ = 3 × 10¹7 cm-³, tox=6 nm, and VFB = -0.983 V, plot Q(VGB) using (a) (2.6.8)

with (2.6.12); (b) (2.6.20), from VGB = VMO +0.6 V to VGB = 3 V. Comment on the accu-

racy of (2.6.20). Assume initially do = 20 + 60, and modify this value if necessary to

decrease the error.