No, Tuvalu is not further west than the prime meridian (zero degrees latitude).
Yes, Tuvalu is further east than the prime meridian (zero degrees latitude). The midpoint of Tuvalu is further east by approximately 12,076 miles (19,434km).
No, Tuvalu is not further north than the equator.
Yes, Tuvalu is further south than the equator. The midpoint of Tuvalu is further south by approximately 492 miles (791km).