Part 1- If 10 is 20% of a value, what is 50% of the value?

Part 2- If 12 is 25% of the value, what is the value?

Part 3- If 6.5 is 22% of a value, what is the value? (round to the nearest tenth)

Part 4- If 6 is 33% of the value, what is the value?