I am 1st year Business Enterprenuership and this subject is Mathematics in Modern World specifically. Thank you

1. Iza can cam P7,800 for doing 3 hours of office work and 2 hours of field work. However, she getsP8,200 if she works two hours in the office and 3 hours in the field. What is the rate per hour of Iza for doing office work and for doing field work? 2. Ed's purse contains some 10-peso, 5 peso, 1-peso, and 25-centavo coins. How many of each type does he have if the purse has a total of P20502 3. Four young children are seated next to each other on a bench. The child on the left cannot be older than the child on the right. The ages of 1 and 3 children differ by 8 years. No child is bekw 2 years old, neither any of them is older than 10 years old. The 2nd child is 7 years younger than the 4th child. What are the ages of the four children