Mean and variance of five observations are $4$ and $5.2$ respectively. If three of these observations are $3,4,4$ then find absolute difference between the other two observations (A) $3$ (B) $7$ (C) $2$ (D) $5$

Construct a grouped frequency distribution table with class size 5 for the data given above taking the first interval as $0-5$ (5 not included). What main features do you observe from this tabular representation?