What are the hybridization states of the carbon atoms in the following molecules?

To identify the type of hybridization for each labeled carbon atom, we count the number of sigma ($\sigma$) bonds and pi ($\pi$) bonds around each carbon.

• A carbon atom with four single bonds (4 $\sigma$ bonds) is $sp^3$ hybridized.
• A carbon atom with one double bond and two single bonds (3 $\sigma$ bonds, 1 $\pi$ bond) is $sp^2$ hybridized.
• A carbon atom with one triple bond and one single bond (2 $\sigma$ bonds, 2 $\pi$ bonds) or two double bonds (2 $\sigma$ bonds, 2 $\pi$ bonds) is $sp$ hybridized.

Let's analyze each molecule: