Given the code below: function M(x) { let f = function(y) { let g = function()...

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Given the code below: function M(x) { let f = function(y) { let g = function() { let r = x + y; x = 0; return r; } return g; } return f; } let h1 = M(a); let h2 = M(a+9); console.log(h1(9) () + h2(6)()) Assume the output of the program is 30, what is the value of a? Given the code below: function M(x) { let f = function(y) { let g = function() { let r = x + y; x = 0; return r; } return g; } return f; } let h1 = M(a); let h2 = M(a+9); console.log(h1(9) () + h2(6)()) Assume the output of the program is 30, what is the value of a?