Write a balanced chemical equation for the reaction that occurs when (a) Calcium metal undergoes a combination

Question:

Write a balanced chemical equation for the reaction that occurs when
(a) Calcium metal undergoes a combination reaction with O2(g)
(b) Copper(II) hydroxide decomposes into copper(II) oxide and water when heated
(c) Heptane, C7H16(l), burns in air
(d) Methyl tert-butyl ether, C5H12O(l), burns in air.