CInc 9. Find the value of c so that the function defines a probability density function on the interval [1, 2]. (Hint: What must the area under the curve be?) https://www. desmos . com/calculator/dzzgmzlirl 1 10. Confirm using technology that exp (-2 dax ~0.6827. This shows that the probability that a V2 TT standard normal random variable lies between -1 and 1 is 68.27%. Now, without using technology, find the following integrals. Show your work. 1 r exp dr V2TT 2 Latexp (7 dx . https : //www. desmos . com/calculator/hukubrsofn 1 11. Use the results of the previous exercise to evaluate r exp dr. H-G V2102 202 Hint: You may consider first apply the formulas derived in exercises 4 and 5 above (in that order) to rewrite the integral. https: //www. desmos . com/calculator/g4qdlox86i