Monthly demand for Accugolf's top rated golf balls in dozens for the last twelve months are shown below.

$\backslash$table$[[$MONTH$,$DEMAND,MONTH,DEMAND$],[$January$,5,200,$July,$7,700],[$February$,5,500,$August,$6,900],[$March$,5,800,$September,$6,500],[$April$,5,600,$October,$6,200],[$May$,6,000,$November,$5,800],[$June$,6,800,$December,$5,700]]$

a$.$ Develop a simple regression model for sales of golf balls. $($Hint: Use the number of balls in dozens as per the problem statement.$)$ Do not round intermediate calculations. Round your answers to two decimal places.

widehat$($ Demand $)=,+$ Month

b$.$ What is the forecast for sales of golf balls in January of the upcoming year? Do not round intermediate calculations. Round your answer to the nearest whole number. dozens of golf balls