The old men vying to lead Africa’s youngest population

Lagos, Nigeria (CNN)On first look, not much separates the two front-runners contesting Nigeria’s presidential election. Both are men in their 70s with previous experience of high-level politics. Both are from the same ethnic group. And both are Muslims from the north of the country. Abubakar, who served as vice president from 1999 to 2007, is a staunch capitalist who made his fortune investing in various sectors in the country. Regardless of who the electorate picks — and there are 70 more candidates to choose from — the outcome will dramatically shape the fortunes of Nigeria’s more than 190 million people. The vote comes at a critical time for the country’s economy, a lynchpin of the region. The recent oil price …