The ff. data are the observed elevation of a point by running a line of levels over four different routes. Probable Errors ±02 +04 Route Elevations 340.22 340.30 340.26 340.32 +06 4 +08 a.) What is the weight of route 3 assuming the weight of route 1 equal to 1? b.) What is the sum of the weighted observation? c.) What is the most probable value of the elevation?

You need to answer in numerical form in two decimal places only unless otherwise specified. For problems having a whole number or zero as an answer, the decimal isn't necessary. For example, if your answer is 900, the decimal isn't necessary. No need to input the units, follow the units given by each problem. ROUNDING OFF VALUES MUST BE DONE ONLY IN THE FINAL ANSWER TO AVOID LARGE DISCREPANCIES. I'll rate!

Let L be the line with parametric equationsx = 1−ty = −4z = 4+tFind the shortest distance d from the point P0=(4, −1, −1) to L, and the point Q on L that is closest to P0. Use the square root symbol '√' where needed to give an exact value for your answer.

selected answers are not necessarily the correct ones