without using excel please.

Question No. 1 Smart mobile Company is going to start a new plant for new smartphones the company's expected sales for the next four years will be $120,350, $140,450, $160,000 and 190,000. The company's financial manager Mr. Nail is expecting to have working capital equal to the 15% of the sales volume. What will be the expected cash flow for working capital each year? Question No. 2 Smart mobile Company is going to start a new plant for new smartphones. The company's expected sales for the old smartphone will drop by 1100 units for next four years. The selling price of old smartphone is $190 and it costs $115 per unit. Calculate erosion cost considering 5% inflation rate? Question No.3 Ericson tech. currently sell 100,000 of its light Wi-Fi repeaters each year, for $130.50 per device. Its cost per device is $70. The company has come up with a newer, powerful repeater, "Extra- boost," which costs $200.00 per device, with retail for $340.00 and should bring in 130,000 new customers (unit sales). What is erosion cost if sales of old devise go down by 20%, what is incremental sales cashflow, is the new devise worth launching