c) This cylindric bar will then be subjected to 3 point bending test as presented below, the normal deflection at the point of rupture is measured as 100 micron, calculate nearly the average fracture stress of the composite bar considering that the coating thickness is 75 micron and the metal diameter is 1 cm. and the bar length is 30 cm (hint: first calculate approximately the amount of strain for which the bar is subjected using Phytagoras theorem, then find composite's elastic modulus and use Hook's law) F= ? 30cm (10P) 100 micron Consider the indenter surface area is 3 mm and assume the two ends of the bar are fixed.