Create the PHONES data set. The data set PHONES contains names and their corresponding phone numbers. Some observations contain missing values for the business or home phone numbers.

data phones;
   length first_name $20 last_name $25;
   input first_name $ last_name $ business_phone home_phone;
   datalines;
Jerome Johnson 9193191677 9198462198
Romeo Montague 8008992164 3609736201
Imani Rashid 5088522146 5083669821
Palinor Kent . 9197823199
Ruby Archuleta . .
Takei Ito 7042982145 .
Tom Joad 2099632764 2096684741
;