Write a python function totalSales(ThisWeek, PastWeek) that accepts two dictionaries of sales (the current week, and the last week) and combines them into one dictionary by aggregating the sales values. Example: ThisWeek = {'Sun': 1200, 'Mon':1100, 'Tue':800, "Wed':500, 'Thu':600, "Fri':700, 'Sat":900} PastWeek = ('Sun':1100, 'Mon':900, Tue':700, "Wed':800, "Thu: 1000, "Fri':900, 'Sat':1000) Expected output: PastWeek = {'Sun':2300, "Mon':2100, Tue:1500, Wed': 1300, "Thu:1600, "Fri: 1600, 'Sat":1900} I