Suppose that s and t are empty stacks and a, b, c, and d are objects. What do the stacks contain after the following sequence of operations executes? Please fill in the following table. Please note: the order of the objects in stacks matters. The leftmost object in the stack should be at the bottom while the right one should be the last one which is put into stack. You can directly copy the table and paste it into the textbox below, then fill your answers into the table. Or, you can create the table in a file (such as word document) and attach your filled table to this question by clicking button "Add File". Content in s Content in t null a ab Operations s.push(a); s.push(b); s.push(); t.push(d); t.push(s.pop(); t.push(s.peeko); s.push(t.pop(); t.pop()