Problem solving note: in order to get maximum points for each problem, clearly write down the equations and the steps that lead to a solution. 1. (20 pts) let us design a stopwatch for a group of super swimmers using the timerl feature of pic18f4580 microcontroller (fosc = 8mhz). the stopwatch can show seconds, tenth second and hun- dredth second. (unfortunately, we don't have enough time to design minutes or more.) the time will be shown on the lcd module which is connected to the portc. (1) the prescaler is 4. calculate the initial value for the register tmri so that the timer overflow flag sets exactly once every 10 milliseconds. (2) define global unsigned char variables secs and msecs, respectively. write a function, deci- mal2ascii), to convert the decimal number into the corresponding ascii codes. in the function, (a) update the initial value in tmr1 register; (b) clear the flag bit; (c) increment the variable msecs. if msecs is larger than 99, clear it and increment the variable secs. if the variable secs is larger than 59, clear all variables; (d) the lcd module will show the time in the format as xx. xxs, for example: 11.75s or 38.54s, etc. write down an algorithm to transfer the values of secs and msecs into ascii digits and store them together with .' and 's' in a 6-element string ascii_time. (define the string as a global vari- able.)