Geography help please

can't seem to get these questions.

In the lithosphere, the velocity of P and S waves ______ as they near the Earth’s
surface
Choose one answer.
a. Stay The Same
b. Increase
c. Decrease
d. Invert Discreetly

Which major zone of the Earth’s interior will S waves not travel through
Choose one answer.
a. hemisphere
b. lithosphere
c. outer core
d. gradesphere
e. inner core

The belts of earthquake activity closely follow the plate boundaries
Answer:
True False

Marks: 1
P waves can produce both up and down as well as sideways shaking of the ground
Answer:
True False


All seismic waves have different periods with equal amplitudes.
Answer:
True False


thanks!!

ans of 2nd q is e.inner core

1st is true
2nd is false

i only noe sum of the ans