Joan is an experienced jigsaw puzzler. on average, she will correctly place a puzzle piece every 30 seconds. a) how long, in hours should it take joan to finish a 3000 piece puzzle? b) how long, in hours and minutes, should it take joan a 10,000 piece puzzle? c) joan works on a puzzle from 7: 00 p. m. to 9: 00 p. m. every weekday. ( she does not work on her puzzle on saturday or sunday.) if she started a new 10,000 piece puzzle on january 15, 2020, on which date would she finish?