(a) Distinguish between White Box and Black Box testing. (b) Explain the principles of low coupling and high cohesion in software design. (c) The…

(a) Distinguish between White Box and Black Box testing.

(b) Explain the principles of low coupling and high cohesion in software design.

(c) The following task must be performed in a software project.

Task	Earliest Time	Most likely time	Latest time	Other Tasks that must precede the task
A	35	50	65	-
B	30	40	50	-
C	15	20	25	A
D	35	45	55	C
E	15	20	30	C
F	15	25	30	D
G	05	11	15	E
H	25	35	45	B, F, G

Draw the precedence diagram and find the expected time of the software project completion using PERT method.