MATLAB CODE HELP

4. Integration a) Show that 2Jxdx -69. b) The results of a certain test are found to be normally distributed, with an average value of 1000 and a 13 10 standard deviation of 150. we can define z = (x-)/. It can be shown that the probability that a test scor vill be below a certain value so s given b(e 2J (e) dz. Find the probability that)x Find the probablitythat will be s 700. Use both the int function and the integral function