Can someone please explain how they got the answer as f in this question? I don't understand. Please explain thoroughly and clearly.

Q4) Given: class S { /* ... */ }; class Q { /* ... */ }; class W : virtual public s, public l { /* ... */ }; class Y : virtual public s, public l { /* ... */ }; class X : virtual public W, virtual public Y { /* ... */ }; write the letter answer labels below that correspond to the all of the possibly TRUE statements that describe the low-to-high memory layout of type X as explained in class and in the lecture slides. If a class appears more than once, write the class name more than once where it appears relative to the other classes. (a) The memory layout of X is this class ordering: S, Q, W, S, Q, Y, X (b) The memory layout of X is this class ordering: Q, S, W, Q, S, Y, X (c) The memory layout of X is this class ordering: Q, S, Y, Q, S, W, X (d) The memory layout of X is this class ordering: S, Q, X, S, Q, W, Y (e) The memory layout of X is this class ordering: Q, S, X, Q, S, W, Y (f) The memory layout of X is this class ordering: S, Q, W, Q, Y, X (g) The memory layout of X is this class ordering: Q, W, S, Q, Y, X (h) The memory layout of X is this class ordering: Q, S, W, Q, Y, X (i) The memory layout of X is this class ordering: Q, W, Q, S, Y, X (j) The memory layout of X is this class ordering: Q, S, W, Q, Y, X (k) The memory layout of X is this class ordering: Q, W, Q, S, Y, X Q4) Given: class S { /* ... */ }; class Q { /* ... */ }; class W : virtual public s, public l { /* ... */ }; class Y : virtual public s, public l { /* ... */ }; class X : virtual public W, virtual public Y { /* ... */ }; write the letter answer labels below that correspond to the all of the possibly TRUE statements that describe the low-to-high memory layout of type X as explained in class and in the lecture slides. If a class appears more than once, write the class name more than once where it appears relative to the other classes. (a) The memory layout of X is this class ordering: S, Q, W, S, Q, Y, X (b) The memory layout of X is this class ordering: Q, S, W, Q, S, Y, X (c) The memory layout of X is this class ordering: Q, S, Y, Q, S, W, X (d) The memory layout of X is this class ordering: S, Q, X, S, Q, W, Y (e) The memory layout of X is this class ordering: Q, S, X, Q, S, W, Y (f) The memory layout of X is this class ordering: S, Q, W, Q, Y, X (g) The memory layout of X is this class ordering: Q, W, S, Q, Y, X (h) The memory layout of X is this class ordering: Q, S, W, Q, Y, X (i) The memory layout of X is this class ordering: Q, W, Q, S, Y, X (j) The memory layout of X is this class ordering: Q, S, W, Q, Y, X (k) The memory layout of X is this class ordering: Q, W, Q, S, Y, X