Taking into account the following activities or situations in the process of installing pollution control equipment in a thermal power plant, it is requested: PREPARE THE GANTT CHART.

Activity	Description	Duration(days)	Preceding
A	Installation of internal components	4	---
B	Installation of external components	6	---
C	Modification of internal structures	4	A
D	External structure installation	8	B
E	Install control system	4	C
F	install control device	10	D
G	Testing and verification	4	E, F