In the following program, what is the data type of x$?$ What is the data type of df$.$a$?$

import pandas as pd

x$=\{\text{'}$a$\text{'}$:$[1,2,3],\text{'}$b$\text{'}$:$[4,5,6],\text{'}$c$\text{'}$:$[7,8,9]\}$

df$=$pd$.$DataFrame$($x$)$