Convert each of the following equations directly to gate-level circuits using any of the standard gates discussed in class (NOT, AND, OR). You may use gates with more than two inputs if needed. a. F(a, b,c) = ab + bc + c b. F(a, b, c,d) = ab + bod c. F(a, b,c, d) = (a + b) * (c+d) +c+d

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater