To determine the last lecture scheduled, let's analyze the given information step by step:
● Computer Science is not on Tuesday or Saturday.
● Psychology is immediately after Organisational Behaviour.
● Statistics is not on Friday, and there is one day gap between Statistics and Research Methods.
● One day prior to the schedule of Economics, there is no lecture (as that day is the off day and Monday is not the 'off' day).
● To find the last lecture scheduled, we need to determine the day when Economics is scheduled.
Let's go through the given information: ● Since Computer Science is not on Tuesday or Saturday, it could be scheduled on Monday, Wednesday, Thursday, or Sunday.
● Psychology is immediately after Organisational Behaviour. From the given information, we can't determine the day for Organisational Behaviour, but we can conclude that Psychology will be scheduled after Organisational Behaviour.
● Statistics is not on Friday, and there is one day gap between Statistics and Research Methods. This means Statistics cannot be on Thursday or Saturday. So, it could be scheduled on Monday, Wednesday, or Sunday.
● One day prior to the schedule of Economics, there is no lecture. Based on this information, we can deduce that Economics cannot be scheduled on Sunday because there would be no day prior to it for the off day. This leaves us with Monday and Wednesday as possible days for Economics.
Now, let's consider the remaining options:
● Research Methods: We know there is a one-day gap between Statistics and Research Methods, and Statistics is not on Friday. If Statistics is scheduled on Monday, then Research Methods could be scheduled on Wednesday. If Statistics is scheduled on Wednesday, then Research Methods could be scheduled on Sunday. Therefore, Research Methods could be scheduled on either Wednesday or Sunday.
● Psychology: We know Psychology is immediately after Organisational Behaviour. Since we don't have information about the day for Organisational Behaviour, we can't determine the day for Psychology.
Considering all the possibilities, the only lecture we can definitively determine is Economics, which can be scheduled on either Monday or Wednesday.
Therefore, the correct answer is option 'A) Economics' as it is the only lecture we can identify with certainty.