Please help I’m not sure what to do

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

What is the volume of this container?