There will be a solution to the Greek debt crisis that will allow the country to return to growth while staying in the euro zone, Prime Minister Alexis Tsipras said on Friday, as the country moved closer to the brink of default. Tsipras’s tone was strikingly upbeat given that talks over a cash-for-reforms deal for Greece remained deadlocked after a meeting of euro zone finance ministers, and bank withdrawals from Greek lenders have accelerated in the past week.