Consider the contingency table below. Compute the marginal frequencies for each row and column, and determine the expected frequency for each cell, assuming the variables are independent.

Row totals: $35$, $15$

Column totals: $30$, $20$

Grand total: $50$

Expected frequencies: ($7$, $8$, $22$, $13$)

Row totals: $35$, $15$

Column totals: $20$, $30$

Grand total: $50$

Expected frequencies: ($9$, $8$, $21$, $12$)

Row totals: $15$, $35$

Column totals: $30$, $20$

Grand total: $50$

Expected frequencies: ($9$, $6$, $21$, $14$)

Row totals: $15$, $35$

Column totals: $20$, $30$

Grand total: $50$

Expected frequencies: ($7$, $8$, $21$, $14$)