The top leaders of PML-N and PPP have discussed a new power-sharing formula for dividing the five-year tenure between them, as efforts to form a coalition govt gathered pace on Monday. “It has been proposed that a PML-N candidate will serve as PM for three years and PPP’s leader for two years,” a source said after a meeting between the leaders of the two parties on Sunday, adding it wasn’t yet decided who will get the first term.PML-N supremo Nawaz Sharif is still in the race for the PM slot despite his party not securing a simple majority. The party is also considering Nawaz’s brother Shehbaz for the post. A PPP leader said the party has not withdrawn from its demand that Bilawal Bhutto-Zardari should be the PM.