hi plz help me with this question and write down detailed steps, thank you!

1.5.1 A discounted note of face amount X, due in one-half year, is valued today at 4992. Find X under each of the following interest calculation methods: (a) Compound interest at effective annual rate 8% (b) Simple interest at annual rate 8% (c) Compound discount at effective annual rate 8% (d) Simple discount at annual rate 8%