in a group of 59 traders, 26 sell gari, eight (8) sell only rice, and 15 sell only maize. ten (10) sell gari and rice, 16 sell rice and maize, and 42 sell maize. each trader sells at least one of the three items. find the number of traders who sell: (a) gari or maize, (b) gari and maize, (c) only two items.​

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.