Venn Diagrams

Okay I'm not technology advanced enough to know how to draw a venn diagram on here, so you are just going to have to imagine.
Circle A has 410 in it, circle B has 100 in it, and the over lap circle has 40 inside.  Inside the rectangle the number is 450, and all together the number is 1,000. 

A and B in this problem represent blood types.  So for circle A you have 410 people with blood type A and for circle B you have 100 people with blood type B.  40 which is the number inside the circle is the number for blood type A and blood type B.  The number 450 which is the inside left corner of the rectangle represents all the people out of the 1,000 people that have neither blood type A or B.  So for number one they ask you for A upside down u of B  and you get 40.  That is the number in the middle of the circle.  For number two you have A UB which is 550-everything in the circle added together.  Number three you have A with a line on top.  This means you add the B and your 450 together to get 550.  Number four is B with the line on top and you get 860 from adding A and 450 together.  A with a line on tope with an upside down u B means just B, which is 100.  A with an upside down u B with a line on top means just A, which is 410.