I need help in this question, I am trying so hard for last few days but i am not able to complete it, please help me, i will be very much thankful. I really need help in this.

1. WHILEL uses the same datatype of binary trees as WHILE does. Consider now the following trees in D: (a) >>> (c) >.>>> According to our encoding of datatypes in D, decide for each tree (a)-(d) whether it encodes i a list of numbers; if it does give the corresponding list. ii a list of lists of numbers; if it does give the corresponding list. Note that an empty list can always be considered a list of numbers and a list of lists of numbers. [20 marks)