Based on available information, lead-time demand for PC jump drives averages 50 units (normally distributed), with a standard deviation of 5 drives. Management wants a 97% service level. Assume the standard deviation and lead time use the same units. a) How many drives should be carried as safety stock? b) What is the appropriate reorder point?

(can you show me how we find z score have an issue on this dont find z score )

0.00 0.01 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.0 0.5160 0.5199 0.5239 0.5279 0.5319 0.5359 0.5636 0.5675 0.5714 0.5753 0.6064 0.6103 0.6141 0.6443 0.6480 0.6517 0.6808 0.6844 0.6879 0.7123 0.7157 0.7190 0.7224 0.7549 0.7852 0.02 0.5000 0.5040 0.5080 0.5120 0.1 0.5398 0.5438 0.5478 0.5517 0.5557 0.5596 0.2 0.5793 0.5832 0.5871 0.5910 0.5948 0.5987 0.6026 0.3 0.6179 0.6217 0.6255 0.6293 0.6331 0.6368 0.6406 0.4 0.6554 0.6591 0.6628 0.6664 0.6700 0.6736 0.6772 0.5 0.6915 0.6950 0.6985 0.7019 0.7054 0.7088 0.6 0.7257 0.7291 0.7324 0.7357 0.7389 0.7422 0.7454 0.7486 0.7517 0.7 0.7580 0.7611 0.7642 0.7673 0.7704 0.7734 0.7764 0.7794 0.7823 0.8 0.7881 0.7910 0.7939 0.7967 0.7995 0.8023 0.8051 0.8078 0.8106 0.9 0.8159 0.8186 0.8212 0.8238 0.8264 0.8289 0.8315 1.0 0.8413 0.8438 0.8461 0.8485 0.8508 0.8531 0.8554 1.1 0.8643 0.8665 0.8686 0.8708 0.8729 0.8749 0.8770 0.8849 0.8869 0.8888 0.8907 0.8925 0.8944 0.8962 0.9032 0.9049 0.9066 0.9082 0.9099 0.9115 1.4 0.9192 0.9207 0.9222 0.9236 0.9251 0.9265 1.5 0.9332 0.9345 0.9357 0.9370 0.9382 0.9394 1.6 0.9452 0.9463 0.9474 0.9484 0.9495 1.7 0.9554 0.9564 0.9573 0.9582 0.9591 0.8133 0.8340 0.8365 0.8389 0.8577 0.8599 0.8621 0.8790 0.8810 0.8830 0.8980 0.8997 0.9015 1.2 1.3 0.9131 0.9147 0.9162 0.9177 0.9279 0.9292 0.9306 0.9319 0.9406 0.9418 0.9429 0.9441 0.9545 0.9505 0.9515 0.9525 0.9535 0.9599 0.9608 0.9616 0.9693 0.9625 0.9633 1.8 0.9641 0.9649 0.9656 0.9664 0.9671 0.9678 0.9686 0.9699 0.9706 1.9 0.9713 0.9719 0.9726 0.9732 0.9738 0.9767 2.0 0.9772 0.9778 0.9783 0.9788 0.9793 0.9744 0.9750 0.9798 0.9803 0.9842 0.9846 0.9878 0.9881 0.9756 0.9761 0.9808 0.9812 0.9850 0.9854 0.9817 2.1 0.9821 0.9826 0.9830 0.9834 0.9838 0.9857 0.9875 0.9884 0.9887 0.9890 0.9911 0.9913 0.9916 0.9909 0.9931 0.9932 0.9934 0.9936 0.9948 0.9949 0.9951 0.9952 0.9962 0.9963 0.9964 0.9974 0.9972 0.9973 0.9979 0.9980 0.9981 0.9986 3.0 0.9990 2.2 0.9861 0.9864 0.9868 0.9871 2.3 0.9893 0.9896 0.9898 0.9901 0.9904 0.9906 2.4 0.9918 0.9920 0.9922 0.9925 0.9927 0.9929 2.5 0.9938 0.9940 0.9941 0.9943 0.9945 0.9946 2.6 0.9953 0.9955 0.9956 0.9957 0.9959 0.9960 0.9961 2.7 0.9965 0.9966 0.9967 0.9968 0.9969 0.9970 0.9971 2.8 0.9974 0.9975 0.9976 0.9977 0.9977 0.9978 0.9979 2.9 0.9981 0.9982 0.9982 0.9983 0.9984 0.9984 0.9985 0.9985 0.9986 0.9987 0.9987 0.9987 0.9988 0.9988 0.9989 0.9989 0.9989 0.9990 0.9990 0.9991 0.9992 0.9992 0.9992 0.9992 0.9993 0.9994 0.9994 0.9994 0.9994 0.9995 0.9995 0.9996 0.9996 0.9996 0.9996 0.9996 0.9997 0.9997 0.9997 0.9997 0.9997 0.9997 0.9998 3.5 0.9998 0.9998 0.9998 0.9998 0.9998 0.9998 0.9998 0.9998 0.9998 3.6 0.9998 0.9998 0.9999 0.9999 0.9999 0.9999 0.9999 0.9999 0.9999 3.7 0.9999 0.9999 0.9999 0.9999 0.9999 0.9999 0.9999 3.8 0.9999 0.9999 0.9999 0.9999 0.9999 0.9999 3.9 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 3.1 0.9991 0.9991 0.9993 3.2 0.9993 0.9993 0.9994 0.9995 3.3 0.9995 0.9995 0.9995 0.9996 3.4 0.9997 0.9997 0.9997 0.9997 0.9998 0.9999 0.9999 0.9999 0.9999 0.9999 0.9999 0.9999 0.9999 1.0000 1.0000 1.0000 1.0000 Z