1) suppose a sales-person makes a sale on 55 percent of customer contacts. in a normal week, the sales person contacts 8 customers. The variance is A) 1.20 B) 1.40 C) 3.6 D) 0.98 E) 1.98 2) the probability that the sales person will make 4 sales is A) 0.257 B) 0.450 C) 0.050 D) 0.263 E) none of the above 3) the probability that he makes 0 sales is A) 0.1890 B) 0.1790 C) 0.0540 D) 0.0017 E) 0.4370