Kebri LTD. sells Radios and Televisions. They have recorded their monthly revenue as follows:
Revenue in Ksh '000' (Y): 321, 287, 209, 397, 388, 224, 344, 464, 433, 315
Radio Units (X1): 58, 71, 95, 105, 114, 126, 17_
a) What is the correlation between revenue and radio units sold?
b) What is the average revenue per radio unit?
c) What is the total revenue for Televisions?
d) What is the average revenue per month?