Can anyone help me with 1.3.1 and 1.3.2 PLZ ​

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Write the pair of fractions as a pair of fractions with a common denominator

Which strategy is used by public health to reduce the incidence of food poisoning?