Which query is used to list a unique value for V_CODE, where the list will produce only a list of those values that are different from one another? Group of answer choices SELECT UNIQUE V_CODE FROM PRODUCT; SELECT DISTINCT V_CODE FROM PRODUCT; SELECT ONLY V_CODE FROM PRODUCT; SELECT DIFFERENT V_CODE FROM PRODUCT;

Least square fit to polynomial write a function leastsquarefit3pol that solves a linear system of equations to find a least squares fit of a third order polynomial to an experimental data set given as two row arrays. the function leastsquarefit3pol must explicitly solve a set of linear equations and cannot use polyfit. there should be no restriction on the size of the problem that can be solved.