中一數學問題(10分)

1.From 2:15 p.m. to 5:30 p.m.,what degrees does the hour hand of a clock rotate?

2.In the figure, point A, O and d lie on the same straight line.
If AOB = BOC -15 AND BOC = COD - 15 ,
find AOB, BOC and COD

第二條既果幅圖我冇畫出黎！而且有D符號我都打唔到
果D咩AOB係角黎架！-15姐係減15度

我其實知道個答案，不過我想問點樣計出黎,仲有條式
如果需要幅圖既可以講低,我畫出黎比你地睇
一題5分呀！10題黎架~幫幫手呀！