please, help me to solve this. need to use R code to solve this question. thank you in advance.

Problem 2 (35 points) Answer the following questions: a. Do not use R! Suppose that two points 81 and s2 are 100 m apart. Calculate the variance of a linear combina tion: (so)Z(sZ(s2). Note: Z(s) is a second order stationary function with a spherical semivariogram with a range -250 m and sill c1-3. Assume the nugget is zero. b. Use R! The table below gives 35 grades on a regular 100m x 100m grid. Calculate the classical variogram in the two principal directions (NS and EW) using h1 = 100m, ha-200m, ha = 300m, without angular tolerance. 3.6 2.8 4.1 4.65.3 3.8 4.2 3.6 3.55.24.5 6.1 4.4 4.0 5.1 3.8 4.9 3.3 5.7 6.2 6.3 4.2 4.0 56 4.24.9 5.3 4.4 4.6 5.76.15.44.7 5.2 6.0 You can create the data set as follows: x c(rep(0,5),rep(100.5),rep (200,5),rep(300,5),rep(400,5),rep(500,5),rep(600,5))