You must fill out the table below, then you must find the values for a, b1 and b2, finally you must determine how much the profits would be if you invest 10 thousand dollars in advertising and if you increase it to 20 sellers. REMEMBER all the procedures and formulas should appear.

Y	X1	X2	1	2	3	4	5
Year	Sales $	promotion	Sales person	X1 Y	X12	X1 X2	X2Y	X22
2017	18	2	2
2018	23	3	4
2019	50	4	6
2020	79	6	8
2021	82	9	10
2022	100	11	12
2023	130	13	14
2024	190	15	16
Total	672	63	18