Statement 1 is debatable as gunpowder was known before Babur, though his application of artillery was new. Statement 2 is incorrect as arch and dome architecture was introduced earlier by the Delhi Sultanate. Statement 3 is correct as Babur was a descendant of Timur and founded the Mughal dynasty. Statement 4 is correct as Babur's skilled use of cannons and artillery tactics revolutionized warfare in India.