The order of stability of the alkenes

$\begin{array}{ccccc}{\text{R}}_2\text{C}={\text{CR}}_2\text{,}& {\text{R}}_2\text{C}=\text{CHR}\text{,}& {\text{R}}_2\text{C}={\text{CH}}_2\text{,}& \text{RCH}=\text{CHR}\text{,}& \text{RCH}={\text{CH}}_2\\ \text{I}& \text{II}& \text{III}& \text{IV}& \text{V}\end{array}$
($\text{R}=-{\text{CH}}_{\text{3}}$)

What is the order of basicity among the following compounds?

The increasing basicity order of the following compounds is:

Arrange the following amines in the decreasing order of basicity.