In a survey of 75 resorts, it was reported that:

45 provided refrigerators in the guest rooms

37 provided laundry services

44 provided business centers

23 provided refrigerators in the guest rooms and laundry services

29 provided refrigerators in the guest rooms and business centers

21 provided laundry services and business centers

12 provided all three features

Construct a Venn diagram and use it to answer the following questions:

(a) How many of the resorts provided only refrigerators in the guest rooms?

(b) How many of the resorts provided exactly one of the features?

(c) How many of the resorts provided at least one of the features?

(d) How many of the resorts provided exactly two of the features?

(e) How many of the resorts provided none of the features?

I'm having problems with this problem, any help would be greatful, the drawing of the diagram is getting to me.