Ethnically, thematically and financially, this year’s Oscar nominees for best picture are a diverse group. Three films feature African-American leads (including the box-office hit “Hidden Figures”) and one stars a British-Indian actor (Dev Patel, in “Lion”). The genres range from science-fiction to biopic to old-fashioned musical. In terms of budget, the numbers go as high as $40 million for “Hacksaw Ridge” and as low as $5 million for “Moonlight.” Here’s how the nominees stack up: