1. Write a program in MIPS assembly language to convert an ASCII number string containing positive and negative integer decimal strings, to an integer. Your program should expect register Sa0 to hold the address of a null terminated string containing some combination of the digits 0 through 9. Your program should compute the integer value equivalent to this string of digits, then place the number in register Sv0. If a non-digit character appears anywhere in the string, your program should stop with the value -1 in register Sv0. For example, if register Sa0 points to a sequence of three bytes 50 base 10, 52 base 10, 0 base 10 (the null terminated string "24"), then when the program stops, register SvO should contain the value 24 base 10