For the given Boolean expression: F(A, B, C, D) = A'.D + A. C'.D' + A. B.C (a) Identify the Static-1 Hazards. (b) Identify the Static-0 Hazards. (c) Determine the sum and/or product term(s) that must be added to the expression to eliminate the hazard(s). (d) Draw the hazard-free logic circuit.

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk