For the heap problems in the quiz, use the level-by-level order to represent them. For a sample max heap below, the root value 30 is the level 0 . And 10 and 20 are the level 1. To the sample heap, add a number "50". After that, add a number "12". For the resulting max heap, choose the correct answers to the questions. (a) Second value of level 1 (b) First value of level 2 (c) Second value of level 2