Espiritu Santo and Pentecost are islands belonging to which nation?

Vanuatu consists of four main islands and 80 smaller islands, spanning a distance of 1,100 kms (684 mi). Vanuatu lies between New Caledonia and Fiji in the South Pacific. The largest of the islands is Espiritu Santo (875 sq mi; 2,266 sq km); others are Efate, Malo, Pentecost, and Tanna. In 2013, Vanuatu’s population was estimated at 252,000 with one-fifth of the population living in the capital Port Vila. Before it's independence in 1980, Vanuatu was jointly administered by France and the U.K. and was known as the New Hebrides for 74 years.

Pentecost is a lush, mountainous island which stretches north to south over some 60 kilometres (37 mi). It has an area of 490 square kilometres (190 sq mi). It was first sighted by the Spanish expedition of Pedro Fernandez de Quiros in April 1606. There are no real towns on Pentecost. The island has a population of almost 17,000 at the 2009 census, most of whom live in small rural villages, surviving by subsistence agriculture and growing cash crops.

Espiritu Santo has an area of 3,955.5 km2 (1,527.2 sq mi) and a population of around 40,000 according to the 2009 census. The town of Luganville is Vanuatu's second-largest settlement and the provincial capital. It was also first sighted by the Spanish expidition of 1606. Today, Espiritu Santo, with many wrecks and reefs to be explored, is a very popular tourist destination for divers. The local people make their living by supporting the tourist trade, by cash-crop farming, mostly copra.