Help ASAP please, need to fill in the chart in the red number boxes

In 1980, alfa romeo introduced the first system to smooth a rough idle caused by ignition and camshaft timing changes.

What is special about a dc circuit ?

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.