写一个MATLAB函数fibo.m来计算Fibonacci数列，其定义如下： fibo(n+2)=fibo(n+1)+fibo(n) 此数列的初始条件如下：fibo(1)=0,fibo(2)=1。-Fibo.m write a MATLAB function to calculate the Fibonacci sequence, which is defined as follows: fibo (n+2) = fibo (n+1)+fibo (n) the initial conditions in this series are as follows: fibo (1) = 0, fibo (2) = 1.