given the data points in the table below, the coefficients of the function determined by the least squares method.

x	1	3	5	8
y	2	7	10	12

This leads to an indefinite system of equations A c = y. To solve the system, we set up the normal equations B c = y.

The matrix A in the overdetermined system of equations has the size____. The matrix B in the normal equations has the size _____. Fill in the blanks.

y() = co + ciln()