Purely from the point of view of the answer to this question, it is 7 + 12 + 8 + 5 + 1 (Grandma Lee herself) = 33 people.
From a practical consideration, with 7 people in front of Grandma Lee and 12 behind her, that's 7+12=19 rows before and after ****, plus the row Grandma Lee herself is in, which is 20 rows.
Then by the same token, 8+5+1=14 rows.
Then use 20x14=280. so one **** is 280 people.
From the second case, if the number of people in the last column is incomplete, then there is no way to calculate it specifically.