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A particular composite product consists of two glass chopped strand mat (CSM) laminas enclosed by two uni-directional carbon laminas, creating a four- layer laminate. Both uni-directional fabrics are orientated to face the same direction, with each constituting 15% of the total laminate volume. Polyester resin forms the matrix material. Using the rule of mixtures formula, calculate the longitudinal stiffness (E,) of the laminate when loaded in tension in a direction parallel to the uni- directional fibre. The following properties apply: . Wf-carton=0.57 . Pf-carbon-1.9 g/cm³ • Pf-glass=2.4 g/cm³ . Pm- 1.23 g/cm³ . Ef-carbon-231 GPa Ef-glass-66 GPa Em-2.93 GPa Assume that ne for the glass CSM= 0.375, and that its fibre weight fraction (W) is half that of the uni-directional carbon. Give your answer in gigapascals, correct to one decimal place. E,- GPa .