The densities of several materials are given in SI units. Convert these to densities in...

The densities of several materials are given in SI units. Convert these to densities in U.S. Customary units (slug/ft³), and also compute the specific weights of these materials in U.S. Customary units (lb/ft³).

(a) Lead (pure),

(b) Ceramic (alumina Al₂O₃),

(c) Polyethylene (high density),

(d) Balsa wood,