1. Sydney wants to buy her friend a Slap-Chop for his birthday. She needs to search for it onlineby using the UPC code, which she thinks is 7-35541-30309-8. Is this code valid? Why or whynot? (Source:upcindex.com)
2. Melissa wrote down the UPC on the Cheetos she was eating during lunch, but she spilled hersoda on it and now the last digit is illegible. If what she has written down is 0-28400-04790-?,then what is the last digit? (Source:upcfoodsearch.com)Circle the answer, and show your work below.a. 4b. 8c. 2d. 6