7.94 In an electronic instrument using the biasing scheme shown in Fig. 7.48(c), a manufacturing error reduces R S to zero. Let VDD = 15 V, RG1 = 10 M, and RG2 =5.1 M. What is the value of V G created? If supplier specifications allow k n to vary from 0.2 to 0.3 mA/V2 and Vt to vary from 1.0 V to 1.5 V, what are the extreme values of ID that may result? What value of RS should have been installed to limit the maximum value of I D to 1.5 mA? Choose an appropriate standard 5% resistor value (refer to Appendix J). What extreme values of current now result?