this question

I. Answer the following word problems involving arithmetic sequence and series. 1. Find the sum of the first 100 positive odd integers. 2. Jenny deposited P20,000 on an investment that will give P1,750 20,000 for every year that the money stays in the account. How much money will she have in her account by the +1,750 - 1 Year end of year 8? 3. Christian decided to start baking chocolate cakes on his spare time during community lockdown Year 8 because of COVID-19 for his X extra income. On his first day, he has five (5) customers who want to avail his chocolate cakes. In continuous rate of orders, his first customer orders 15 chocolate cakes, his second customer orders 18 chocolate cakes, his third customer orders 21 chocolate cakes and so on. If one chocolate cake is being sold at P150.00, how much is his total sale for his first day