(a) Estimate the tunneling probability of a particle with an effective mass of 0.067 m₀ (an electron in gallium arsenide), where m₀ is the mass of an electron, tunneling through a rectangular potential barrier of height V₀= 0.8 eV and width 15 A⁰. The panicle kinetic energy is 0.20 eV. (b) Repeat part (a) if the effective mass of the panicle is 1.08 m₀ (an electron in silicon).