please show the steps to arrive to answer.

Sometimes it is believed that Bo is 0 because we think that E(Y|X = 0) = 0. Then the appropriate model is Yi = B,X+ This model is usually called regression through the origin since the regression line is forced through the origin. The least-squares estimator of B, minimizes n {{Y; B,X;}? i=1 Find a formula that gives 1 as a function of the Yis and the Xis. Sometimes it is believed that Bo is 0 because we think that E(Y|X = 0) = 0. Then the appropriate model is Yi = B,X+ This model is usually called regression through the origin since the regression line is forced through the origin. The least-squares estimator of B, minimizes n {{Y; B,X;}? i=1 Find a formula that gives 1 as a function of the Yis and the Xis