3.7) A structural composite is composed of continuous filaments aligned in the load carrying direction. The filaments are known to fracture in a brittle fashion at a stress of 2000 MPa and a strain of 0.01. The brittle matrix containing them fails at 30 MPa and a strain of 0.25: the matrix material accounts for 75% of the bulk of the composite. What is the effective elastic modulus of the composite in the filament direction