7.9 elements. Write a single ents of x except the smallest and Let x be a vector of length three or greater that contains numeric element command that calculates the sample mean of all of the elements of x exce largest Write an R command that creates a 2 x 3 matrix' named x that contains the fi integers entered row-wise into the matrix. Display x. Then write another Rc uses the dim function to change the dimensions of x to a 3 x 2 matrix. Display the matrix x 7.10 ontains the first six positive rite another command that 7.11 Write two R commands that calculate ( cos(30) 7.12 Write two R commands that calculate 7.13 Write a single R command that calculates 7.14 7.15 7.16 Write a single R command that calculates e Write a single R command that calculates 1 +23+...+100 Write a single R command that creates a vector with elements 5- 5 (5. 10 7.17 using a minimum number of keystrokes. Write a single R command that calculates 7.18 The two-element vector named pointl contains the x-coordinate and the y-coordinate of a point on the Cartesian coordinate system. Likewise for point 2. Write a single R command that calculates the quantity of interest requested below. (al Calculate the distance between the two points, where distance is interpreted as the Euclidean distance, the distance "as the crow flies," or the L, norm. (h) Calculate the rectilinear distance between the two points, where the rectilinear du tance is interpreted as the "Manhattan distance," "axicab norm," or the Li norm Experiment with the Sys.sleep function using a single argument, a small integer, to de 7.10 mine its purpose