Chem 316Problem Set 41. For the molecular formula C6H11N:a. calculate the units of unsaturation:b. list the possible combinations of pi bonds and rings that could make up the units ofunsaturation found in part (a) and draw an isomer to represent each combination.2. Draw the two compounds with the formula CH3CH=NCH3.3. For the following molecules, draw and label the cis and trans isomers. If geometricisomers cannot exist, write "no cis or trans".4. Draw the various eclipsed and staggered conformations for the following alkane.Label each conformer as “totally eclipsed,” “eclipsed,” guache,” and “anti.” Graph therelative energy of each conformer.5. 1,2-dichloroethane is shown below:ClCla. Draw the various eclipsed and staggered conformations of 1,2-dichloroethaneusing Newman projections. Label each conformation as "totally eclipsed,""eclipsed," "gauche," and "anti."b. Graph the relative energy of each conformation. (Assume that 0 ˚ is the totallyeclipsed conformation).