Having the following table and network find the activity with maximum cost slope Activity Normal Crash Normal Crash Cost Cost slope duration Duration Cost A 120 100 12000 14000 20 15 1800 2800 C 40 30 16000 22000 30 20 1400 2000 50 40 3600 4800 F 60 45 13500 18000 A 120 20 D E. finish 40 30 50 60 Select one: a. Activity (F) b. Activity (A) c. Activity (E) d. Activity (C) DE

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Alloys

An alloy is an admixture of two or more metals or a metal and a non-metal. Since ancient times, man has been using alloys. Alloying helps to retain the properties of the parent matter, such as hardness, strength, toughness, ductility and is corrosion-resistant. Copper alloys such as brass have antimicrobial properties that help to fight against (Coronavirus disease 2019) COVID-19 and other hospital-acquired infections. Some common alloys are brass, bronze, solder steel, etc. Most alloys have a lower melting point than their constituents. This is due to the presence of a nonmetal as one of the constituents that behaves as an impurity and restricts the raise of melting point.