Matlab question

The Fibonacci numbers are computed according to the following relation: Fn = Fn1 + Fn2 with F0 =0 F1 = 1 by definition. Therefore, after F0 and F1, each number in the series is the sum of the previous two. Write a function numToMaxFib that will take one input argument, M, and return the number of elements N in the Finonacci series, that are less than or equal to M if M is greater than 1. Otherwise the function must return -1. Following is the signature for your function: function N = numToMaxFib(M) Input: M - the specified maximum value for the series Output: N - number of elements in the series less than or equal to M If the user specifies an invalid value for S_N, such as 0, 1 or a negative number, the function must return -1 Following are some example input and output values. M = 1, N = -1 M = 2, N = 4 M = 4, N = 5