On going from right to left in a period in the periodic table,the electronegativity of the elements:

Given below are two statements :
Statement $I$ : The electronegativity of group $14$ elements from $Si$ to $Pb$ gradually decreases.
Statement $II$ : Group $14$ contains non-metallic,metallic,as well as metalloid elements.
In the light of the above statements,choose the most appropriate from the options given below :

Compare the polarity of the $N-H$ bond and the $N-F$ bond.

Select the incorrect order of electronegativity of the element.

Among $Me_{3}N$,$C_{5}H_{5}N$ and $MeCN$ $(Me = \text{methyl group})$,the electronegativity of $N$ is in the order:

If coordinate $X$ is atomic number,then select the best option for the $Y$ coordinate based on the given graph for $Li$,$Na$,and $K$.