December Temperature. The file calledDectemp. JMPcontains data on lowest tempera-tures (in Fahrenheit) in December and elevation (in thousand feet) at 38 different locations inMinnesota and Colorado, both cities and national parks. (In the data set, red represents citiesfrom Minnesota while blue from Colorado.) Mary is a researcher at marketing department of aparka factory. The marketing strategy is closely related to the weather condition. She thinksthey should enhance promotion during the coldest weather. So she wants to predict the lowesttemperature based on elevation.(a) Identify the explanatory variable (x):(Choose one.)i. Marketing strategyii. Lowest temperature in Decemberiii. Highest temperature in Decemberiv. Elevation