Insert commas suitably and write the names according to International System of Numeration:
(a). 78921092 (b). 7452283
(c). 99985102 (c). 48049831
(a) 78,921,092
Seventy eight million nine hundred twenty one thousand ninety two
(b) 7,452,283
Seven million four hundred fifty two thousand two hundred eighty three
(c) 99,985,102
Ninety nine million nine hundred eighty five thousand one hundred two
(d) 48, 049,831
Forty eight million forty nine thousand eight hundred thirty one