please answer the three questions

Use the table of properties of fibers and conventional bulk materials from the chapter 1 slides, Table 2.1 in the textbook, or any other sources from internet, (1) compare the tensile strengths and moduli of glass fiber, carbon fiber, Kevlar and steel; (2) compare the specific tensile strengths and specific moduli of glass fiber, carbon fiber, Kevlar and steel; (3) Why the specific strength and modulus are important in discussion of composites