I need just graphs for this two questions please

Q1: The pressure drop P in pounds per square inch (psi) in a particular oil reservoir is a function of the number of years t that the reservoir has been in operation. The pressure drop is approximated by the equation P =150t - 20t +t'. (a) By using MATLAB, Excel, CAS calculator or an appropriate standard engineering software, find the number of years for the pressure to drop 400 psi. (b) By using MATLAB, Excel, CAS calculator or an appropriate standard engineering software, sketch the graph of pressure versus number of years between 0 to 10 years. PC 1.1, 1.2, 1.3, 2.1, 2.3, 2.4, 2.5 A: Exponentials/Logarithms Q2 You are using an excavator on a cold winter day (209 outside) and the engine overheats (at about 220 9F). When you turn off the engine, it begins to cool down. The temperature 7 of the engine t minutes after you park satisfies the equation log. T - 20 = -0.11t . 200 (a) Solve the equation for T. (b) Use part (a) and MATLAB, Excel, CAS calculator or an appropriate standard engineering software to find the temperature of the engine between 1 to 20 minutes