The following data were obtained in a resin burn-off test of an E-glass-polyester composite sample: Weight of an empty crucible =10.1528g Weight of crucible + sample before burn-off =10.5219g Weight of crucible + sample after burn-off =10.3221g Calculate the fiber weight fraction, the fiber volume fraction, and the density of the composite sample. Given: fiber density =2.54g/cm3 and matrix density =1.25g/cm3