Please help me to solve this question in R I need all steps

Please help me to solve this question in R. I need all steps and R-code. Thank you

If X N(2,9) compute: (a) P(X 2) (b) P(1 s X 7) (c) P(-2.5,3 X -1) Now, suppose X1, , Xn~N(2,9) for n = 9. Compute: (d) P(-1.75 X 8.4). (Hint: You should start by stating the distribution of X.) (e) P(X1 2X2+3X3 > 2.9). (Hint: You should start by stating the distribution ofXi 2X2+3X