Now we want you to determine the marginal pdf fx(x). This requires you to set up an integral, and evaluate it. 11.4.1 (1 mark) Firstly, what integral might that be? Enter an integral expression using the 5 syntax described below. Think of the letter S (note that it is capitalised) as a stylised integral sign. Inside the brackets are the lower limit, upper limit and the integrand multiplied by a differential liked that it won't be dx, will it?), separated by commas. Validate will display a correctly entered integral expression in the standard way, e.g. try validating: s(1,2,5x+x) fx(x)= You have not attempted this yet To evaluate your integral above, you need to find an antiderivative Fof its integrand. Put another way, F is what you get when you treat ler as an indefinite integral and don't bother with an integration constant. Enter an appropriate antiderivative function F, below. F= You have not attempted this yet Now evaluate fx(x) i.e. this requires you to substitute the limits into F. fx(x)= You have not attempted this yet Finally, what is the marginal pdf fy(y) This requires you to set up an integral, and evaluate it, but you're on your own this time :-) fy(y) = You have not attempted this yet 11.4.2 (5 marks) 11.4.3 (5 marks) 11.5 (1 mark)